Citations
- 848 F. Supp. 2d 725
Full opinion text
OPINION AND ORDER
LAWRENCE P. ZATKOFF, District Judge.
I. INTRODUCTION
This matter is before the Court on:
1. Plaintiffs Motion for Summary Judgment on Defendant’s Counterclaims in Count III (Shop Right) and Count TV (License) (Docket #95);
2. Plaintiffs Motion for Summary Judgment on the First Affirmative Defense (Patent Invalidity) and Counterclaim Count I (Declaratory Judgment of Patent Invalidity and Unenforceability) (Docket # 96);
3. Plaintiffs Motion for Summary-Judgment on Defendant’s Fourth Affirmative Defense (Laches, Estoppel and Waiver) (Docket # 97);
4. Plaintiffs Motion for Summary Judgment on Infringement by Defendant (Docket # 100);
5. Defendant’s Motion for Partial Summary Judgment Based on the Lack of Infringement (Docket # 101); and
6. Defendant’s Motion to Dismiss on Summary Judgment Based on CoInventorship (Docket # 102).
The parties fully briefed all six motions. The Court finds that the facts and legal arguments material to all the motions have been adequately presented in the parties’ papers, and the decision process will not be aided by oral arguments. Pursuant to E.D. Mich. Local R. 7.1(f)(2), it is hereby ORDERED that the Motions be resolved on the briefs submitted.
II. BACKGROUND
In the mid-1990s, non-party Schukra of North America, Ltd. (“Schukra”), a Windsor, Ontario company, supplied automakers with lumbar support systems for power seats in automobiles. Schukra also was working to enhance the lumbar support system to incorporate a massage feature within the seat units it sold. In 1994, Schukra contracted with a company called Therm-O-Disc to develop a prototype massage control module, or controller, for the seat massage unit. On March 21, 1996, Schukra made a formal presentation of its prototype seat massage units to Delphi Interior and Lighting Systems (“Delphi”), a tier one supplier to General Motors. The prototype massage units were subsequently ride tested in Cadillac automobiles in June 1996. Delphi and Cadillac shortly thereafter offered to purchase a number of seat massage units for implementation into specific Cadillac models in the United States, provided said units could be timely “productionized” (i.e., made fully functional and manufactured to meet desired performance specifications). When Therm-O-Disc was unable to meet production demands and/or deadlines, Schukra contracted with Plaintiff to productionize the massage control module for Schukra. In the words of Kevin Cherry (“Cherry”), Schukra’s technical program manager for the massage control module project: “Plaintiff was responsible for the engineering work, and the manufacturing of the controller that was to control the massage unit” (emphasis added). One of the conditions to “productionizing” the massage control module was that the controller had to be transparent to the seat control mechanism already in place. As stated by Barry Jones (“Jones”), an employee of Delphi in 1996 and now Schukra’s President:
[T]he massage control module must have NO impact on the existing seat memory module. [Plaintiff] must develop both driver (with memory) and passenger (no memory) massage modules.
(emphasis added).
Plaintiff successfully engineered a mechanism that satisfied Schukra’s requirements when it designed a device it called the “transparency simulator,” which consisted of a massage control module enhanced to not only maintain the higher priority of functions in the existing seat control but also include the enhanced massage control modules without interfering with the existing seat functions. Plaintiff also filed with the U.S. Patent and Trademark Office (“PTO”) a patent application with respect to the massage control modules (“MCMs”) it designed and the mechanistic implications this design had on an integrated seat massager unit. On April 11, 2000, the PTO issued Patent Number 6,049,748 (hereinafter, “the '748 Patent”). Todd Newman (“Newman”), David Shank (“Shank”) and John Washeleski (“Washeleski”), each of whom was employed by Plaintiff and assigned his contribution or patent rights in the '748 Patent to Plaintiff, were identified as the “Inventors” of the '748 Patent. In order to supply seat massager units to Delphi and Cadillac, Schukra continued to contract with Plaintiff for the MCMs for a number of years. Schukra hired Defendant in 2002 to replace Plaintiff as the sole supplier of the MCMs.
Plaintiff filed bankruptcy on December 19, 2002, and emerged from bankruptcy on January 25, 2006. Plaintiff then filed this lawsuit on February 16, 2006, alleging that Defendant infringed protected claims of the '748 Patent (namely claims 1 and 7) when Defendant began manufacturing and supplying massage control modules to Schukra in Plaintiffs stead. More specifically, Plaintiff seeks to enforce intellectual property rights it believes cover the two types of MCMs defined in the '748 Patent: (1) a memory MCM for power seats that record positioning data into computer memory so the driver may recall his preferred seatback angle and distance from the steering wheel, and (2) a non-memory MCM that provides massage functionality for power seats that do not record or recall seat positioning.
At the dispositive motion cut-off deadline, the parties filed the motions identified at the outset of this Opinion. Previously, the Court granted Defendant’s motion for summary judgment based on Plaintiffs failure to name one of the alleged co-inventors of the ’748 Patent on its patent application (Docket # 166). The alleged co-inventor was Joseph Benson (“Benson”), a mechanical engineer for Schukra who claimed to have contributed to a number of claims in the '748 Patent, including claims 1, 2, 11, 12, 14 and 15. The Court held that Benson was a co-inventor based on his contributions to claim 11 and dismissed Plaintiffs cause of action. The Federal Circuit Court of Appeals later reversed this Court’s ruling that Benson was a co-inventor on claim 11 of the '748 Patent, and the Federal Circuit remanded the case to this Court. Nartron Corp. v. Schukra U.S.A., Inc., 558 F.3d 1352 (Fed. Cir.2009).
III. LEGAL STANDARD
“The court shall grant summary judgment if the movant shows that there is no genuine dispute as to any material fact and the movant is entitled to judgment as a matter of law.” Fed.R.Civ.P. 56(a). See also Celotex Corp. v. Catrett, 477 U.S. 317, 322, 106 S.Ct. 2548, 91 L.Ed.2d 265 (1986) (“[T]he plain language of Rule 56[ ] mandates the entry of summary judgment ... against a party who fails to make a showing sufficient to establish the existence of an element essential to that party’s case, and on which that party will bear the burden of proof at trial.”). A party must support its assertions by:
(A) citing to particular parts of materials in the record, including depositions, documents, electronically stored information, affidavits or declarations, stipulations (including those made for purposes of the motion only), admissions, interrogatory answers, or other materials; or
(B) showing that the materials cited do not establish the absence or presence of a genuine dispute, or that an adverse party cannot produce admissible evidence to support the fact.
Fed.R.Civ.P. 56(c)(1). “The court need consider only the cited materials, but it may consider other materials in the record.” Fed.R.Civ.P. 56(c)(3).
The moving party bears the initial burden of demonstrating the absence of any genuine dispute as to a material fact, and all inferences should be made in favor of the nonmoving party. Celotex, 477 U.S. at 323, 106 S.Ct. 2548. The moving party discharges its burden by “ ‘showing’ — that is, pointing out to the district court — that there is an absence of evidence to support the nonmoving party’s case.” Horton v. Potter, 369 F.3d 906, 909 (6th Cir.2004) (citing Celotex, 477 U.S. at 325, 106 S.Ct. 2548).
Once the moving party has met its initial burden, the burden then shifts to the non-moving party, who “must do more than simply show that there is some metaphysical doubt as to the material facts.” Matsushita Elec. Indus. Co. v. Zenith Radio Corp., 475 U.S. 574, 586, 106 S.Ct. 1348, 89 L.Ed.2d 538 (1986). “[T]he mere existence of a scintilla of evidence in support of the [nonmoving party’s] position will be insufficient [to defeat a motion for summary judgment]; there must be evidence on which the jury could reasonably find for the [nonmoving party].” Anderson v. Liberty Lobby, Inc., 477 U.S. 242, 252, 106 S.Ct. 2505, 91 L.Ed.2d 202 (1986).
IV. ANALYSIS REGARDING CO-INVENTORSHIP
A. Applicable Law
Where a patent has been issued, there is a presumption that the named inventors are the true and only inventors. 35 U.S.C. § 282. The burden of showing misjoinder or nonjoinder of inventors must be proved by clear and convincing evidence. Hess v. Advanced Cardiovascular Systems, Inc., 106 F.3d 976, 980 (Fed.Cir. 1997). “35 U.S.C. § 256 provides that a co-inventor omitted from an issued patent may be added to the patent by a court ‘before which such matter is called into question.’ ” Ethicon, Inc. v. United States Surgical Corp., 135 F.3d 1456, 1461 (Fed. Cir.1998). The only named co-inventors of the '748 Patent are Newman, Shank and Washeleski. As noted above, Defendant has asserted that Benson was a co-inventor as to claims 1, 2, 11, 12, 14 and 15. In order to prevail on that argument, Defendant must, by clear and convincing evidence, overcome the presumption that Benson is not a co-inventor.
To date, only Defendant’s assertion regarding claim 11 has been decided on the merits. As noted above, the Federal Circuit held that Benson was not a co-inventor as to claim 11. Like this Court, however, the Federal Circuit did not express any opinion as to the other claims of the '748 for which Defendant asserted Benson was a co-inventor. Nartron, 558 F.3d at 1359 n. *. Therefore, the Court now must analyze Benson’s alleged contribution to claims 1, 2, 12, 14 and 15, as well as the '748 Patent as a whole.
B. Federal Circuit Ruling and Law
The Court’s analysis shall be conducted in light of the following law set forth by the Federal Circuit in this case:
Inventorship is a question of law[.] Ethicon, Inc. v. U.S. Surgical Corp., 135 F.3d 1456, 1460 (Fed.Cir.1998). “The inventors as named in an issued patent are presumed to be correct.” Hess v. Advanced Cardiovascular Sys., Inc., 106 F.3d 976, 980 (Fed.Cir.1997) (quotation marks omitted). Thus, a party alleging non joinder “must meet the heavy burden of proving its case by clear and convincing evidence.” Eli Lilly & Co. v. Aradigm Corp., 376 F.3d 1352, 1358 (Fed.Cir.2004).
# i|i # ‡ ij: ‡
In Hess, we held that Hess was not a co-inventor, when he had explained the state of the art to the inventors and had suggested that the inventors use a particular material in their product. 106 F.3d at 980-81. In this case, as in Hess, Benson’s contribution to the extender amounted to “nothing more than explaining to the inventors what the then state of the art was and supplying a product for them for use in their invention.” Id. at 981. Also, like the situation in Hess, the “extensive research and development work that produced” the claimed control module was done by [Plaintifffs employees. Id. Although Benson claims to have researched and developed a particular extender, [Defendant] admits that the basic concept of an extender, which is all that is disclosed in the '748 patent concerning the extender, was in part prior art. Similarly to Hess, therefore, Benson cannot be considered a co-inventor of claim 11. See id. Thus, in a factually similar case, we have held a putative inventor’s contribution not to rise to the level of co-inventorship. This is not a case in which a person claims to be an inventor because he has suggested a non-obvious combination of prior art elements to the named inventors. Such an infidel may be a co-inventor. There is not, and could not be, any claim that the addition of the extender here was anything but obvious. Benson’s contribution therefore does not make him a co-inventor of the subject matter of claim 11.
One further point should be made. [Defendant] asserts that Benson was the inventor of the sole feature added by claim 11. However, a dependent claim adding one claim limitation to a parent claim is still a claim to the invention of the parent claim, albeit with the added feature; it is not a claim to the added feature alone. Even if Benson did suggest the addition of the prior art extender to what [Plaintiff] had invented, the invention of claim 11 was not the extender, but included all of the features of claims 1, 5, and 6, from which it depends. It has not yet been determined whether Benson contributed to claim 1 (although he does not claim to be a co-inventor with respect to claims 5 and 6). If Benson did not make those inventions, he does not necessarily attain the status of co-inventor by providing the sole feature of the dependent claim. See id. (holding that Hess was not a co-inventor, even though he supplied “heat-shrinkable plastic,” which was the only additional limitation recited in dependent claim 12 of the patent in suit).
[Defendant] also asserts that Benson was a co-inventor of the '748 patent because he realized that a control module with certain specifications would be useful, and he gave [Plaintiff] a description detailing the ultimate functions of the control module. [Plaintiff], according to [Defendant], simply carried out the invention by building that control module. However, “[o]ne who merely suggests an idea of a result to be accomplished, rather than means of accomplishing it, is not a joint inventor.” Garrett Corp. v. United States, 190 Ct.Cl. 858, 422 F.2d 874, 881 (1970); see also Eli Lilly, 376 F.3d at 1359 (stating that one who is “too far removed from the real-world realization of an invention” is not a co-inventor); Ethicon, Inc. v. U.S. Surgical Corp., 937 F.Supp. 1015, 1035 (D.Conn.1996) (“An entrepreneur’s request to another to create a product that will fulfill a certain function is not conception — even if the entrepreneur supplies continuous input on the acceptability of offered products.” (quotation marks omitted)), aff'd, 135 F.3d 1456 (Fed.Cir.1998). Thus, Benson is not entitled to co-inventorship by simply posing the result to [Plaintiff] and leaving it to [Plaintiff] to figure out how to accomplish it.
Nartron, 558 F.3d at 1356, 1358-59.
C. Analysis
As set forth in footnote 1 of this Court’s March 31, 2008, 2008 WL 896060, Opinion and Order:
At various times, and with varying degrees of vigor and support, Defendant also asserts that Benson [and/or others] contributed to claims 1, 2, 12, 14 and 15 of the '748 Patent. Defendant has not, however, offered the name(s) of any other such co-inventor(s).
In other words, Defendant has set forth little argument, to say nothing of evidence, to demonstrate that Benson contributed to claims 1, 2, 12, 14 and 15. In fact, as Benson admitted:
1. He had “very little” working knowledge of the software logic within the Plaintiffs massage control module,
2. He did not have the electronic skills to do the circuitry or the programmable logic required to realize the transparency simulator of claim 1 of the '748 Patent.
3. The lumbar support adjustor recited in claim 12 was not his contribution because it pre-dated his employment with Schukra,
4. The extender element described in claim ... 14 was a “conventional mechanical connection,” and
5. The multiple adjustors recited in claim 15 also were conventional technology.
Benson also admitted he had no skill set in electronics engineering, as evidenced by the following exchange at this deposition:
Q. You have never designed a driver circuit, correct, implemented electronically, correct?
A. That’s correct.
Q. And through your education and work experience you don’t have the skill set to design electrical circuits, correct?
A. That’s correct.
In addition, Benson has admitted on multiple occasions that he was not involved in the design or development of the MCMs that included the transparency simulator. For example, as Benson stated in his affidavit: “Nartron was involved in this project to add a transparency circuit feature to the controller in order to make it transparent to the automotive computer as we conceived it and presented it to Nartron.” (emphasis added). Likewise, as Benson stated at his deposition, “Again, my role in this is to pass along the specifications we receive from Delphi to get this to work. The circuitry and the packaging was [sic] Nartron’s responsibility.” (emphasis added). The testimony of Schukra personnel reinforces Benson’s statements. See, e.g., Cherry Dep., p 12, 11. 18-24 (“Q. What did you understand Nartron’s assignment to be in relation to the technical development of the massage control module? A. They were responsible for engineering work, and manufacturing of the controller that was to control the massage unit.”). See also Jones Declaration (“the massage control module must have NO impact on the existing seat memory module. Nartron must develop both driver (with memory) and passenger (no memory) massage modules.”).
D. Conclusion
For the reasons stated above, the Court finds that Benson did not make any contribution to the engineering of the massage control module claimed in the '748 Patent. Benson’s assertions of contributions in claims 1, 2,12,14 and 15 of the '748 Patent (as well as claim 11, as previously determined) ring hollow because Benson did not exercise any skill beyond what would have been conventional in the art. Accordingly, the Court finds that Benson (and Sehukra) “simply pos[ed] the result to [Plaintiff] and le[ft] it to [Plaintiff] to figure out how to accomplish it.” As the Federal Circuit held when considering the appeal in this case, such involvement does not entitle a person to co-inventorship. See Nartron, 558 F.3d at 1359. The Court therefore concludes that Defendant cannot show, by clear and convincing evidence, that: (1) Benson conceived of the contribution of any element, or (2) Benson’s contribution to the claimed invention is “not insignificant in quality.” As such, the Court holds that Benson was not a co-inventor of the '748 Patent. Accordingly, the Court denies Defendant’s Motion to Dismiss on Summary Judgment Based on Co-Inventorship.
Y. ANALYSIS REGARDING THE INFRINGEMENT MOTIONS
In its Motion for Summary Judgment on Infringement, Plaintiff argues this Court should grant summary judgment in its favor based on: (1) Defendant’s direct infringement of claim 1 of the '748 Patent, and (2) Defendant’s contributory infringement of claim 7 of the '748 Patent. In its Motion for Partial Summary Judgment Based on Lack of Infringement, Defendant counters that its MCM for non-memory systems cannot directly infringe (and therefore cannot contributorily infringe) the protected claims of the '748 Patent because Defendant’s device is missing an entire aspect detailed within the claim limitations.
A. Patent Infringement
Plaintiff has the burden of proving by a preponderance of the evidence that the asserted claims are infringed. See, e.g., S.R.I. Int’l v. Matsushita Elec. Corp. of Amen, 775 F.2d 1107, 1123 (Fed.Cir. 1985).
1. Direct Infringement
35 U.S.C. § 271(a) defines patent infringement:
“Except as otherwise provided in this title, whoever without authority makes, issues, offers to sell, or sells any patented invention, within the United States or imports into the United States any patented invention during the term of the patent therefore, infringes the patent.”
“To prove direct infringement, the plaintiff must establish by a preponderance of the evidence that one or more claims of the patent read on the accused device literally or under the doctrine of equivalents.” Cross Med. Prods., Inc. v. Medtronic Sofamor Danek, Inc., 424 F.3d 1293, 1310 (Fed.Cir.2005) (citation omitted). “Literal infringement requires that each and every limitation set forth in a claim appear in an accused product.” Id. (quoting Frank’s Casing Crew & Rental Tools, Inc. v. Weatherford Int’l, Inc., 389 F.3d 1370, 1378 (Fed.Cir.2004)). See also Builders Concrete, Inc. v. Bremerton Concrete Products Co., 757 F.2d 255 (Fed.Cir.1985) (citations omitted). Establishing direct infringement by arguing there is no evidence that the accused device would be noninfringing may be tested first by determination of the scope of the claim at issue, and second “by an examination of the evidence before the court to ascertain whether, under § 271(c), use of the [accused device] would infringe the claim as interpreted.” C.R. Bard, Inc. v. Advanced Cardiovascular Sys., Inc., 911 F.2d 670, 673 (Fed.Cir. 1990).
However, “[t]he scope of a patent is not limited to its literal terms but instead embraces all equivalents to the claims described.” Festo Corp. v. Shoketsu Kinzoku Kogyo Kabushiki Co., Ltd., 535 U.S. 722, 732, 122 S.Ct. 1831, 152 L.Ed.2d 944 (2002) (citing Winans v. Denmead, 56 U.S. (15 How.) 330, 347, 14 L.Ed. 717 (1854)). In other words, “[ijnfringement may be found under the doctrine of equivalents if an accused product ‘performs substantially the same overall function or work, in substantially the same way, to obtain substantially the same overall result as the claimed invention.’ ” Wilson Sporting Goods Co. v. David Geoffrey & Associates, 904 F.2d 677, 683 (Fed.Cir. 1990) (quoting Pennwalt Corp. v. Durand-Wayland, Inc., 833 F.2d 931, 934 (Fed.Cir. 1987) (citations omitted) (emphasis in original)). The doctrine of equivalents may be limited through prosecution history estoppel by restricting the patentee from “contending later in an infringement action that his claims should be interpreted as if limitations added by amendment were not present or that claims abandoned are still present.” Thomas & Betts Corp. v. Litton Sys., Inc., 720 F.2d 1572, 1579 (Fed.Cir. 1983) (citing Square Liner 860°, Inc. v. Chisum, 691 F.2d 362 (8th Cir.1982)). Therefore, if “the patentee originally claimed the subject matter alleged to infringe but then narrowed the claim in response to a rejection [a rejection indicates the examiner did not believe the original claim could be patented], he may not argue that the surrendered territory comprised unforeseen subject matter that should be deemed equivalent to the literal claims of the issued patent.” Id. at 733-34, 122 S.Ct. 1831.
2. Contributory Infringement
In addition to direct infringement of a patent pursuant to 35 U.S.C. § 271(a), a patent can be contributorily infringed, as set forth in 35 U.S.C. § 271(c):
Whoever offers to sell or sells within the United States or imports into the United States a component of a patented machine, manufacture, combination, or composition, or a material or apparatus for use in practicing a patented process, constituting a material part of the invention, knowing the same to be especially, made or especially adapted for use in an infringement of such patent, and not a staple article or commodity of commerce suitable for substantial noninfringing use, shall be liable as a contributory infringer.
A plaintiff claiming contributory infringement must prove the following elements:
(1) the defendant sold a component or apparatus for use in practicing the patented process;
(2) the component or apparatus constitutes a material part of the invention;
(3) the defendant knew the component or apparatus was especially made or adapted for use in infringing the patent; and
(4) the component or apparatus sold is not a staple article or commodity of commerce suitable for substantial noninfringing use.
C.R. Bard, Inc., 911 F.2d at 673. Preemption Devices, Inc. v. Minnesota Mining Mfg. Co., 803 F.2d 1170, 1174 (Fed.Cir. 1986), aff'd, 824 F.2d 977 (Fed.Cir.1987) (contributory infringement requires knowledge of the patent, as well as of the alleged infringement). Contributory infringement requires knowledge of the patent, as well as of the alleged infringement. Preemption Devices, Inc., 803 F.2d at 1174. “[I]f there is no direct infringement of a patente, however,] there can be no contributory infringement.” Aro Mfg. Co. v. Convertible Top Replacement Co., 377 U.S. 476, 483, 84 S.Ct. 1526, 12 L.Ed.2d 457 (1964). See also Met-Coil Sys. Corp. v. Korners Unlimited, Inc., 803 F.2d 684, 687 (Fed.Cir.1986).
B. Claim Construction
In a patent infringement case, the Court construes all disputed terms. 02 Micro Int’l Ltd. v. Beyond Innovation Technology Co., Ltd., 521 F.3d 1351, 1361 (Fed.Cir.2008). “[C]laim interpretation ... is an issue of law, and a dispute regarding that legal issue does not preclude summary judgment.” Molinaro v. Fannon/Courier Corp., 745 F.2d 651, 654 (Fed. Cir.1984) (citations omitted) (emphasis in original). “A disputed issue of fact may, of course, arise in connection with interpretation of a term in a claim if there is a genuine evidentiary conflict created by the underlying probative evidence pertinent to the claim’s interpretation,” thus precluding a court from ruling on summary judgment. Johnston v. IVAC Corp., 885 F.2d 1574, 1580 (Fed.Cir.1989). Absent such evidentiary conflict, “claim interpretation may be resolved as an issue of law by the court on summary judgment taking into account the specification, prosecution history, or other [extrinsic] evidence.” Id. “Conflicting opinions on the meaning of a term which are merely conclusory do not create such evidentiary conflict.” Id.
The Court’s task when assessing infringement requires a two-step analysis: (1) the claims must be properly construed to determine the meaning and scope of claim limitations; and (2) the accused device must be compared to the properly interpreted language in the claims. Markman v. Westview Instruments, Inc., 52 F.3d 967, 976 (Fed.Cir. 1995) (en banc), aff'd 517 U.S. 370, 116 S.Ct. 1384, 134 L.Ed.2d 577 (1996). In construing the terms of a patent claim, the Court first examines “the words of the claims themselves, both asserted and nonasserted, to define the scope of the patented invention.” Vitronics Corp. v. Conceptronic, Inc., 90 F.3d 1576, 1582 (Fed. Cir.1996) (citations omitted). The Court generally must give the words of a claim their “ordinary and customary meaning,” which is “the meaning that the term would have to a person of ordinary skill in the art in question at the time of the invention, i.e., as of the effective filing date of the patent application.” Phillips v. AWH Corp., 415 F.3d 1303, 1312-13 (Fed.Cir. 2005) (citations omitted).
The Court then must review “the specifications to determine whether the inventor had used any terms in a manner inconsistent.with their ordinary meaning.” Vitronics, 90 F.3d at 1582. The specification “is always highly relevant to the claim construction analysis. Usually, it is dis-positive; it is the single best guide to the meaning of a disputed term.” Id. A specification also potentially may reveal an intent of the inventor to disclaim, or disavow, the scope of the particular claim. Phillips, 415 F.3d at 1316.
The third type of intrinsic evidence the Court must consider for proper claim construction is the prosecution history of the patent before the PTO. Vitronics, 90 F.3d at 1582. “Statements about a claim term made by an examiner during prosecution of an application may be evidence of how one of skill in the art understood the term at the time the application was filed.” Salazar v. Procter & Gamble Co., 414 F.3d 1342, 1347 (Fed.Cir.2005) (emphasis added). As with the specification, the patent applicant may “provide[] evidence of how the PTO and the inventor understood the patent ... Yet because the prosecution history represents an ongoing negotiation between the PTO and the applicant, ... it often lacks the clarity of the specification and thus is less useful for claim construction purposes.” Phillips, 415 F.3d at 1317. Moreover, “[t]he examiner’s unilateral remarks alone do not affect the scope of the claim, let alone show a surrender of claimed subject matter that cannot be recaptured under the doctrine of equivalents.” Salazar, 414 F.3d at 1347 (emphasis added).
The Court also may use extrinsic evidence to elicit proper claim construction. Phillips, 415 F.3d at 1317. Extrinsic evidence “consists of all evidence external to the patent and prosecution history, including expert and inventor testimony, dictionaries, and learned treatises.” Markman, 52 F.3d at 980 (citations omitted). This extrinsic evidence is “less significant than the intrinsic record” and is not likely “to result in a reliable interpretation of patent claim scope unless considered in the context of intrinsic evidence.” Phillips, 415 F.3d at 1317-19.
C. Proper Claim Construction of the Term “Transparency Simulator”
Plaintiff states that:
Properly construed, the term “transparency simulator” means a component of the massage control module that allows functions of the massage control module to be transparent to the operation of the existing seat control system.
Plaintiffs assertion is consistent with, and supported by, the specification of the '748 Patent, which states:
References to the transparency simulator refer to the feature that the seat control module is transparent in function to the existing seat control mechanism, regardless of whether it enhances the system function, monitors the system function, or guides the system function through virtual signals.
'748 Patent, col. 2, ll. 23-27. This definition, chosen by the patentee, reveals multiple scenarios that bring about said transparency. It accurately portrays what is detailed in later specifications; namely, that virtual signals: (1) are not the only means by which transparency can be achieved, (2) can be used to at least “guide system function,” and (3) are not of necessity to “enhancing” or “monitoring” system function (variable or continuous voltage signals and other analog outputs may also accomplish this).
Defendant contends that, for purposes of proper claim construction, the term “transparency simulator” must be construed as a device that outputs “virtual signals” to: (1) the seat controller in memory type seat systems, or (2) the MCM itself in non-memory seat systems. The Court notes that Defendant (intentionally or otherwise) relies on an erroneous recitation of a statement within the '748 Patent to support its contention regarding the transparency simulator. Specifically, when quoting the specification describing the transparency simulator, Defendant’s briefs repeatedly and consistently have included a comma between “function” and “through” in the last line of the quoted language in the preceding paragraph (ie., '748 Patent, col. 2, ll. 23-27). The comma added by Defendant completely modifies the meaning of the sentence, perhaps explaining why Defendant erroneously argues that sending “virtual signals” is the only desired manner to achieve system transparency.
For the reasons set forth below, including the language found in the claims and specifications of the '748 Patent, as well as its prosecution history, the Court concludes that the proper construction of “transparency simulator” is not limited to a device which only sends a “virtual signal” output for an existing seat controller to receive (i.e., a memory MCM).
1. Claim Language
The '748 Patent application states that what is claimed is: (a) for claim 1 (the memory MCM), a seat control module that includes, among other components, “a transparency simulator for maintaining full function of said seat control and removing indications of repeatedly adjusting said lumbar support position;” and (b) for claim 7 (the non-memory MCM), a seat control mechanism that includes a massage control module with “a transparency simulator for maintaining original movement and inducing said enhanced movement of said lumbar support.” '748 patent, col. 19-20. Accordingly, the Court finds that the language of the claims expressly provides that a transparency simulator is a component of both the memory MCMs and non-memory MCMs.
2. Specifications
“Infringement, literal or by equivalence, is determined by comparing an accused product not with a preferred embodiment described in the specification, or with a commercialized embodiment of the patentee, but with the properly and previously construed claims in suit.” SRI Int’l v. Matsushita Elec. Corp. of Am., 775 F.2d 1107, 1121 (Fed.Cir.1985) (citations omitted). In addition, disputed claim terms must be read in light of the specification(s) of which they are a part. Environmental Instruments v. Sutron Corp., 877 F.2d 1561, 1564 (Fed.Cir.1989).
According to: (a) the specifications of the '748 Patent, and (b) the type of seat system the MCM is meant to provide with functionality, several methods may be employed to achieve the necessary transparency. As detailed in a description of the preferred embodiment of the device in the '748 Patent:
The [massage control] module may simulate a transparent connection, for example, by installation as an in-line complement to or a replacement of an existing memory type seat controller (36) or as a complement to an existing non-memory type seat control (23).
'748 patent, col. 4, ll. 49-54. See also Washeleski Dep., pp. 23, ll. 16-25, pp. 24, ll. 1-9. Furthermore, “[the non-memory MCM (23) ] will not interfere with any other motor controller and will function in low priority dependent operation to provide .the lumbar massage feature for that seat mechanism.” '748 Patent, at col. 5, ll. 50-53. A specification exists for achieving transparency simulation to maintain original movement in the non-memory seats:
In the case of a non-memory type seat control system 22 ... the lumbar support position can alternatively be analytically derived in various ways such as an absolute encoder on the motor where added expense can be accommodated. A resolver on the motor or a simple incremental encoder on the lumbar support drive motor may be used in less expensive embodiments.
Id. at col. 4, ll. 58-65.
The specifications also include methodologies that can be utilized to make the massager in motion appear static and therefore transparent to the system. For example, one preferred embodiment that does not necessarily require a virtual output from the massage control module to a positioning sensor is:
Alternative to determining lumbar support position by direct measurement of some physically sensed variable is the option of empirically measuring the relative amounts of time, under ambient conditions of temperature, voltage, and lumbar load, to drive the lumbar support from either end of travel (EOT).
Id. at col. 5, ll. 3-9.
The Court further finds that the specifications of the '748 Patent contemplate that a “transparency simulator” includes such potential analog outputs as power, current, or voltage. As such, generating various types of output signals (in order to maintain original functionality and system priority) is an aspect of the massage control module transparency simulator protected by the claims of the '748 Patent.
3. Prosecution History
The examination of the prosecution history of a disputed patent may enable a court to limit claim scope through disavowal or acquiescence. Phillips, 415 F.3d at 1319. The prosecution history “contains the complete record of all the proceedings before the Patent and Trademark Office.” Vitronics, 90 F.3d at 1582. In the Reasons for Allowance of the '748 Patent, the Patent Examiner in the PTO stated (in relation to the memory MCMs only):
The prior art if record [sic] does not teach or suggest a seat control module for introducing massage to a seat control with an adjustable lumbar support, and control actuators. Wherein the control module includes an intercept interface, and a driver. In particular, the prior art does not teach or suggest a transparency simulator which provides for the massage control module to be transparent to the higher priority of all functions of existing seat control. The massage control module, through the transparency simulator, intercepts the true lumbar support position signal from a sensor and provides a simulated virtual lumbar support position signal to the seat controller.
'748 patent, Reasons for Allowance, V. Lissi Mojica, 3/28/1999.
Defendant argues that this language indicates a transparency circuit in any allowed claim must “provide a simulated virtual lumbar support position signal to the seat controller.” As Plaintiff did not respond to the Patent Examiner’s statement, Defendant argues that Plaintiff agreed with the Patent Examiner and is bound by Defendant’s interpretation. The Court disagrees with Defendant’s arguments for several reasons. First, the Patent Examiner did not reject Plaintiffs claims. Second, Plaintiff was not ordered to relinquish any claim language. Rather, the Patent Examiner’s statement merely detailed the primary reason why the Plaintiffs devices with a transparency simulator component were sufficiently different from, and would not be suggested by, any prior art. Third, a disavowal of claim limitations is not established simply because Plaintiff did not object when it received the Patent Examiner’s Reasons for Allowance. An uncontested statement made by the Patent Examiner does not alter the scope of the claims. See Salazar, 414 F.3d at 1347 (“the examiner’s unilateral remarks alone do not affect the scope of the claim, let alone show a surrender of claimed subject matter.”). Finally, Plaintiff did not affirmatively acquiesce in the Patent Examiner’s statement.
A Conclusion
Defendant has presented no probative evidence pertinent to the claim interpretation of “transparency simulator” that creates a genuine dispute of fact. Accordingly, it is appropriate for the Court to determine the meaning of transparency simulator on summary judgment. Johnston, 885 F.2d at 1580. Therefore, for the reasons set forth above, including the plain language of claims, the specifications of the '748 Patent and its prosecution history, the Court concludes that a proper interpretation of “transparency simulator” means a component of a MCM that enables lumbar massage application and simultaneously “[prioritizes] original functions,” making the controller operate transparently to the existing seat control mechanism and electrical system in the vehicle.
D. Defendants MCMs were Sold in, and/or Imported into, the United States
Defendant argues Plaintiff has not provided proof that Defendant’s allegedly infringing activity occurred in the United States, as required for direct infringement pursuant to 35 U.S.C. § 271(a) and/or contributory infringement pursuant to 35 U.S.C. § 271(c). Defendant argues that “[i]f the goods are shipped out of the country and the sales transaction takes place completely outside the United States, then the patent statute does not reach the transaction.” Robotic Vision Systems v. View Engineering Inc., 39 U.S.P.Q.2d (BNA) 1117, 1119, 1995 WL 867456 (C.D.Cal.1995) (citing Dowagiac Mfg. Co. v. Minnesota Moline Plow Co., 235 U.S. 641, 650, 35 S.Ct. 221, 59 L.Ed. 398 (1915)); Johns Hopkins University v. CellPro, Inc., 152 F.3d 1342, 1367 (Fed.Cir.1998). The Court finds Defendant’s argument unavailing under the circumstances of this case, a case where Defendant manufactured the allegedly infringing MCMs in the United States.
Defendant’s reliance on Robotic, Dowagiac and CellPro is misplaced. In those cases, the allegedly infringing items: (1) were determined not to be infringing items because they were manufactured in the United States prior to the issuance of the patent {Robotic)-, (2) were made in the United States but not by the defendant, whose only activity related to the infringing items was to sell the items in Canada after the items passed out of the makers’ hands, thus making the place of sale (rather than the place of manufacture) the controlling factor {Dowagiac); and (3) were manufactured by the defendant in another country (Canada), and were “for use in products to be sold outside the United States” {CellPro). Moreover, each of those three cases makes it clear that if a party “makes” the infringing product in the United States during the term of the applicable patent, the manufacturing party has violated Section 271(a).
Here, the undisputed evidence is that Defendant, with a principal place of business in Michigan, produced and manufactured the memory and non-memory MCMs exclusively within the United States. As Section 271(a) states, in part: “whoever without authority makes, issues, offers to sell, or sells any patented invention, within the United States ... during the term of the patent therefore, infringes the patent.” Accordingly, as Defendant manufactured the MCMs exclusively within the United States during the term of the '748 Patent, the Court concludes that, to the extent that either of Defendant’s MCMs directly infringe on the '748 Patent, such direct infringement occurred in the United States and in violation of Section 271(a).
Defendant argues that it “shipped the control modules to Canada and has no knowledge of how they were used or if they were used.” The Court finds this argument disingenuous. First, as Defendant has admitted, Defendant sold its product from within Michigan to Schukra in Windsor, Ontario. The very purpose of Defendant’s arrangement with Schukra was to produce memory MCMs and non-memory MCMs that Schukra would incorporate into seats produced by Schukra in Windsor. In addition, it is undisputed that Schukra’s seats would be and were installed in Cadillac’s “E/K/Ksp” vehicles, vehicles that were assembled at a General Motors plant in Hamtramck, Michigan, United States of America. Thus, Defendant’s suggestion that it did not know how or if its control modules were used is misleading, at best. Therefore, even if the MCMs produced by Defendant could be considered component parts of the MCMs covered by the '748 Patent, the infringing activity associated with the MCMs also satisfied the “within the United States” element of contributory infringement under Section 271(c).
E. Infringement of the '748 Patent by Defendant’s Memory MCMs
Claim 1 of the '748 Patent is as follows:
1. A seat control module for introducing massage to a seat control with an adjustable lumbar support, and control actuators, the control module comprising:
a modular housing including in-line connectors for coupling said module to a seat control harness connector; an intercept interface for receiving inputs from said control actuators; a driver for repeatedly adjusting said lumbar support position through a predetermined range of movement in response to one of said control actuators; and
a transparency simulator for maintaining full function of said seat control and removing indications of repeatedly adjusting said lumbar support position.
'748 patent, col. 19, ll. 13-26 (emphasis added). Although only a product specification of the function of Defendant’s devices is on record, sufficient technical insight exists enabling the Court to compare the accused devices and find them both to infringe the above claims. These product specifications suffice because Defendant offers no other design requirements distinguishing its devices from those claimed in the '748 Patent.
For the following reasons, the Court finds that Defendant’s memory MCM embodies all of the elements of claim 1, including a transparency simulator. First, Larry Krueger, Defendant’s President, acknowledged that all of the limitations of claim 1 of the '748 Patent were met by Defendant’s memory MCM, except that he believed Defendant’s modules lacked the “transparency simulator” limitation, as he understood the meaning of the term. As set forth above, however, Defendant’s interpretation of “transparency simulator” (ie., a device that must output “virtual signals”) is flawed.
Second, Defendant’s MCMs do contain transparency simulators, albeit not by name. As the following pertinent quotations from the Product Specifications utilized by Defendant demonstrate, each element of claim 1 of the '748 Patent exists in Defendant’s MCMs:
— The module shall be connected to the seat harness by means of a 16-way header connector, (the equivalent of '748 Patent’s modular housing)
— Lumbar massage operation will begin with a lumbar up switch input of no more than 390 ms. Up Switch and Down Switch Inputs, (the equivalent of '748 Patent’s intercept interface)
— The massage module controls the vertical adjustment reversible DC motor. Massage motion will be accomplished by energizing the up/ down lumbar motor continuously in one direction, causing the lumbar to move up and down 50 mm in each direction, (the equivalent of '748’s Patent driver)
— The massage function will operate for 10 minutes +/10 seconds and return to the position it was at before the massage began. The massage module shall neither alter nor inhibit the function or performance of any other electrical system on the vehicle except as specified in this document, (the equivalent of '748 Patent’s transparency simulator)
Product Spec., pp. 7-11 (emphasis added). As such, the Court finds that Defendant’s Product Specification discloses each limitation of claim 1. In addition to the foregoing, the Court finds that Defendant’s Product Specification tracks how the transparency simulator: (a) functions in Plaintiffs memory MCM, and (b) is protected by the claims and specifications of the '748 Patent. Specifically, the Product Specification states that “during a lumbar massage, the massage module must output a simulated stationary lumbar vertical position signal to the memory seat module. This prevents the memory seat module from seeing the lumbar up/down in motion.” Id. at 10.
Defendant argues that the term driver, as used in claim 1, is in some way external to the massage controller or control module, but its argument is unsubstantiated. In fact, Defendant’s President (Krueger) has admitted that both Defendant’s memory MCMs and Defendant’s non-memory MCMs include the driver of claim 1 and driver circuit of claim 7. Moreover, the plain language of the patent claim, as corroborated by the common definition and use of an electronic driver, indicates clearly how such a driver would operate as a function of the MCM:
a driver for repeatedly adjusting said lumbar support position through a predetermined range of movement in response to one of said control actuators; and
In other words, the driver is a part of the MCM (just as the modular housing intercept interface and transparency simulator are), and there is no requirement that the driver be peripherally external to the MCM itself. The “driver” in the control module of claim 1 receives electrical inputs from control actuators and relays electrical signals to the motor that drives the lumbar support position, imitating massage function. Significantly, Defendant’s Product Specifications reveal that its MCMs do not establish this massage movement through any substantially different means:
[T]he massage module controls the vertical adjustment reversible DC motor. Massage motion will be accomplished by energizing the up/down lumbar motor continuously in one direction, causing the motor to move up and down 50 mm in each direction.
For the reasons set forth above, Defendant has presented the Court with: (1) no information that creates a genuine issue of material fact as it relates to Defendant’s literal infringement of Plaintiffs memory MCM, and (2) no support for a finding of non-infringement with respect to claim 1. Thus, the Court finds that the undisputed evidence repudiates Defendant’s assertion that its memory MCMs do not exploit the transparency simulator of claim 1. The Court also finds that the memory MCM manufactured and sold by Defendant: (a) embodies all the elements of claim 1, as properly construed, including a transparency simulator, and (b) literally infringes claim 1 of the '748 Patent. Builders Concrete, Inc., 757 F.2d at 255. Accordingly, the Court holds that Plaintiff is entitled to judgment as a matter of law on Defendant’s direct infringement of Plaintiffs patented memory MCM (claim 1).
F. Infringement of the '748 Patent by Defendant’s Non-Memory MCMs
Claim 7 of the '748 Patent states:
7. A seat control mechanism comprising:
a vehicle seat having a position adjustment mechanism, wherein said mechanism includes a lumbar support, at least one motor, and an adjustor responsive to said motor for displacing said lumbar support;
a motor control including at least one actuator for actuating said motor and said adjustor; and
a massage control module including an intercept interface for receiving an output from said at least one actuator, a driver circuit for signaling said motor to repeatedly adjust said lumbar support as an enhanced movement, and a transparency simulator for maintaining original movement and inducing said enhanced movement of said lumbar supports, said driver discriminating between a first predetermined movement of said at least one actuator and a second movement of said at least one actuator before signaling an enhanced movement of said lumbar support or maintaining original movement.
'748 patent, col. 20, ll. 1-19 (emphasis added).
Defendant’s President, Larry Krueger, admitted during his deposition that Defendant’s non-memory MCM was part of a system that met the “vehicle seat” and “motor control” limitations of claim 7. Krueger also conceded that Defendant’s non-memory MCMs included the “intercept interface for receiving an output from ... at least one actuator” and the “driver circuit for signaling said motor to repeatedly adjust said lumbar support as an enhanced movement.” Krueger opined, however, that Defendant’s non-memory MCM lacked one of the elements of Plaintiffs non-memory MCM, specifically a “transparency simulator” that sends “simulated virtual signals to the seat controller.” Defendant’s argument fails for several reasons.
First, as discussed above, Defendant’s Product Specifications designate that Defendant’s non-memory MCMs are transparent to the existing seat system (ie., there is a transparency simulator):
The massage module shall neither alter nor inhibit the function or performance of any other electrical system on the vehicle except as specified in this document.
Defendant’s Product Spec, at 9.
Second, Defendant erroneously concludes that its MCMs for non-memory power seats do not infringe a single claim of the '748 Patent because its “non-memory massage control modules do not intercept signals or send virtual signals,” a “the hallmark of the '748 Patent” (ie., the “transparency simulator” is necessarily present in each claim). As discussed above, however, Defendant’s argument is based on its erroneous reading of the meaning of “transparency simulator” set forth in the '748 Patent specifications. Likewise, a reading of the specifications does not support Defendant’s argument that “the absence of an external virtual signal sent to achieve transparency with the original seat system is sufficient to conclude no transparency simulator is found whatsoever.” Rather, as the Court has determined, neither the plain language of the claims, nor the specifications within the '748 Patent, mandate that the controller send virtual signals to a positioning sensor for establishing the desired transparency.
In other words, Defendant’s transparency simulator construction impermissibly reads non-memory module embodiments out of the claims of the '748 Patent. “A claim interpretation that reads out a preferred embodiment ‘is rarely, if ever, correct and would require highly persuasive evidentiary support.’ ” Amgen Inc. v. Hoechst Marion Roussel, Inc., 314 F.3d 1313, 1349 (Fed.Cir.2003) (quoting Vitronics, 90 F.3d at 1583). As set forth above, the technical specifications in the '748 Patent describe how transparency is achieved through different means in non-memory controllers. Specifically, the descriptions about how to accomplish vertical lumbar functionality are illustrative of how schematically diverse the transparency simulator can be.
Third, Defendant misinterprets the phrase “a transparency simulator for maintaining original movement.” Defendant would have the Court interpret “original movement” as “reverting to the original position stored by memory seat position controllers.” Defendant’s interpretation does not reflect the correct meaning of “original movement.” The plain and ordinary language of claim 7, especially when read in conjunction with the proper definition of the transparency simulator in the specification in the patent, establishes why Defendant’s interpretation is erroneous.
The correct interpretation of “original movement” is the manually-controlled power seat movement available before adding the MCM controls that are unimpeded by addition of the MCM. See '748 Patent, col. 2, ll. 53-58 (“The existing seat controller module can be replaced with an alternative massage control module (MCM) offering current control features plus increased functionality upgrades, especially to include the new and improved feature of automatic lumbar massage without affecting the original functions.”). In fact, the same transparency simulator for “maintaining original movement” is covered in both claims 1 and 7 of the '748 Patent, as set forth in the following specification:
This method of functional control modification is based upon the in-line modular massage control module 34 intercepting real signals and/or power and transparently substituting simulated signals and/or power between the seat controller 21 and the external devices of sensor 40, motor 18, and switches 46. The case of the non-memory system II is simpler by virtue of not having to interface sensor signals to the seat control.
'748 Patent, col. 8, ll. 33-41 (emphasis added). As the language reproduced in italics above clearly illustrates, Plaintiffs non-memory MCMs do not need to communicate exclusively with seat control to achieve transparency. Rather, for non-memory seat systems, the MCM acts as the seat controller found in memory position systems; it is the controller which runs the motor and enables massage functionality within the seat. See Washeleski Dep., pp. 123 ll. 13-24, pp. 124 ll. 1-15.
Accordingly, the Court finds that “maintaining original movement” means preserving the ability to adjust the power seat controls as if no massage controller had ever been installed. Both of the MCMs manufactured by Defendant achieve transparency between the control module and the existing seat system while preserving the ability to control the seat-forward and seat-back positioning. Defendant’s Product Spec., pp. 7-10 (“After massage, the module returns to its original position” and “If a massage operation is not in progress, and a lumbar down switch input of greater than 20 ms occurs, the lumbar will begin traveling downward. If the lumbar down switch is released after less than 390 ms, the lumbar will return to the position it was at before the lumbar down switch input occurred.”).
Finally, Defendant has not supplied the Court with any evidence that would indicate that the accused device is noninfringing. Moreover, as set forth above, nothing in the record shows that Defendant’s non-memory MCM operates in a manner inconsistent with Plaintiffs protected non-memory MCM. To the contrary, the drawings and specifications governing the MCMs manufactured by Defendant reflect that:
The lumbar vertical position sensor provides an analog voltage which varies directly with the seat lumbar vertical position ... The non-memory massage module will provide a supply voltage for the lumbar vertical sensor ... [and] the module shall activate the sensor feed output whenever the module is awake; otherwise, the sensor feed output shall remain inactive.
For the reasons set forth above, the Court concludes that: (1) Defendant’s non-memory MCM includes a transparency simulator, and (2) that transparency simulator sends a signal (voltage) that influences system positioning sensors to believe the displacement of the moving lumbar support remains constant, thereby maintaining original movement and higher system priority. The Court also finds that the non-memory MCM manufactured and sold by Defendant: (a) embodies all the elements of claim 7, as properly construed, including a “transparency simulator for maintaining original movement,” and (b) literally infringes claim 7 of the '748 Patent. Builders Concrete, Inc., 757 F.2d at 255.
Accordingly, the Court holds that Plaintiff is entitled to judgment as a matter of law on Defendant’s direct infringement of Plaintiffs patented non-memory MCM (claim 7). For the same reasons, Defendant’s motion for partial summary judgment based on lack of infringement (based on the non-memory MCMs produced by Defendant) must be denied.
VI. ANALYSIS REGARDING EQUITABLE DEFENSES
Defendant has asserted the affirmative equitable defenses of laches, estoppel, and waiver. Plaintiff maintains that these defenses should be dismissed as a matter of law. Plaintiff asserts that the proof elements of each defense are not supported by the pretrial evidentiary record, as Plaintiff did not: (1) unreasonably or inexcusably delay filing suit on any basis that would invoke equity, (2) intentionally mislead Defendant to its own detriment, or (3) intentionally relinquish or abandon a known right.
A. Laches Defense
In order to invoke the laches defense, a defendant must prove, by a preponderance of the evidence, the following factors:
(1) That the plaintiff delayed filing suit for an unreasonable and inexcusable length of time from the time the plaintiff knew or reasonably should have known of its claim against the defendant, and
(2) That the delay operated to the prejudice or injury of the defendant.
See Costello v. United States, 365 U.S. 265, 282, 81 S.Ct. 534, 543, 5 L.Ed.2d 551 (1961); Meyers v. Brooks Shoe Inc., 912 F.2d 1459, 1461 (Fed.Cir.1990); Hottel Corp. v. Seaman Corp., 833 F.2d 1570, 1572 (Fed.Cir.1987). “Where a patentee delays bringing suit for more than six years after the date the patentee knew or should have known of the alleged infringer’s activity,” a presumption of laches will arise. A.C. Aukerman Co. v. Chaides Const. Co., 960 F.2d 1020, 1028, 1034 (Fed. Cir.1992). If, however, the time period is less than six years, there is no presumption of laches. Id. at 1038. The period of delay is measured from the time the patentee knew or reasonably should have known of the alleged infringement by the accused to the date the suit was filed. See Bott v. Four Star, 807 F.2d 1567 (Fed.Cir.1986); see also Studiengesellschaft Kohle v. Eastman Kodak Co., 616 F.2d 1315, 1326 (5th Cir.1980).
The prejudice suffered by a defendant in the application of a laches defense “may be either economic or evidentiary.” A.C. Aukerman Co., 960 F.2d at 1033. “Evidentiary or ‘defense’ prejudice may arise by reason of a defendant’s inability to present a full and fair defense on the merits due to a loss of records, the death of a witness, or the unreliability of memories of long past events, thereby undermining the court’s ability to judge the facts.” Id.; see also Cornetta v. United States, 851 F.2d 1372, 1378 (Fed.Cir.1988). When the consequences of an untimely filed or delayed complaint cause a defendant to suffer monetary loss, e.g., “incur[ring] damages which likely would have been prevented by earlier suit,” a finding of economic prejudice may be warranted. A.C. Aukerman Co., 960 F.2d at 1033.
In this case, Defendant argues that Plaintiff unreasonably delayed filing its lawsuit and the delay resulted in prejudice suffered by Defendant. Defendant contends the delay between when Plaintiff became reasonably aware of potential infringement and when the complaint was filed prejudiced Defendant’s evidentiary defense of this patent infringement action because of Plaintiffs document destruction program. See TWM Mfg. Co., Inc. v. Dura Corp., 592 F.2d 346, 349 (6th Cir. 1979). Plaintiffs document destruction program about which Defendant complains is instituted once every three years and allege