Mobile Telecommunications Technologies, LLC v. T-Mobile USA, Inc. (78 F. Supp. 3d 634, 2015)

Citations

78 F. Supp. 3d 634

Full opinion text

CLAIM CONSTRUCTION MEMORANDUM AND ORDER

ROY S. PAYNE, United States Magistrate Judge

On October 21, 2014, the Court held a hearing to determine the proper construction of the disputed claim terms in United States Patents No. 5,590,403, 5,659,891, and 5,915,210. After considering the arguments made by the parties at the hearing and in the parties’ claim construction briefing '(Dkt. Nos. 58, 62, and 64), the Court issues this Claim Construction Memorandum and Order.

Table of Contents

BACKGROUND.. .637

LEGAL PRINCIPLES ...637

THE PARTIES’ STIPULATED TERMS ...638

CONSTRUCTION OF DISPUTED TERMS IN U.S. PATENTS NO. 5,590,403 AND 5,915,210.. .638

A. “transmitter[s]” and “base transmitters]”. . .639

B. “set of transmitters” and “set of base transmitter[s]” ... 642

C. “transmit ... in simulcast,” “transmitted ... in simulcast,” and “transmitting ... in simulcast” ... 645

D. “block of information” ... 649

CONSTRUCTION OF DISPUTED TERMS IN U.S. PATENT NO. 5,659,-891...650

A. “single mask-defined, bandlimited channel” ... 650

B. “independently receiving one of said plurality of carriers” ... 654

C. “paging carriers” and “modulated carriers” ... 656

D. “same location” ... 658

E. “subchannel(s)” ... 660

F. “spaced within the mask”... 662

G. Preambles of Claims 1, 3, and 5 ...665

H. “said plurality of carriers can be emanated from the same transmission source”... 665

I. “frequency difference between the center frequencies of each adjacent carrier”. . .666

J. “adjacent carriers overlap” and “adjacent subchannels overlap”... 669

CONCLUSION.. .669

APPENDIX A ...670

BACKGROUND

Plaintiff brings suit alleging infringement of United States Patents No. 5,590,-403 (“the ’403 Patent”), 5,659,891 (“the ’891 Patent”), and 5,915,210 (“the ’210 Patent”) (collectively, the “patents-in-suit”). In general, the patents-in-suit relate to wireless messaging systems. Below, the Court addresses the ’403 Patent and the ’210 Patent together and addresses the ’891 Patent separately, as the parties have done.

LEGAL PRINCIPLES

“It is a ‘bedrock principle’ of patent law that ‘the claims of a patent define the invention to which the patentee is entitled the right to exclude.’ ” Phillips v. AWH Corp., 415 F.3d 1303, 1312 (Fed.Cir.2005) (en banc) (quoting Innova/Pure Water, Inc. v. Safari Water Filtration Sys., Inc., 381 F.3d 1111, 1115 (Fed.Cir.2004)). To determine the meaning of the claims, courts start by considering the intrinsic evidence. See id. at 1313; see also C.R. Bard, Inc. v. U.S. Surgical Corp., 388 F.3d 858, 861 (Fed.Cir.2004); Bell Atl. Network Servs., Inc. v. Covad Commc’ns Group, Inc., 262 F.3d 1258, 1267 (Fed.Cir.2001). The intrinsic evidence includes the claims themselves, the specification, and the prosecution history. See Phillips, 415 F.3d at 1314; C.R. Bard, 388 F.3d at 861. Courts give claim terms their ordinary and accustomed meaning as understood by one of ordinary skill in the art at the time of the invention in the context of the entire patent. Phillips, 415 F.3d at 1312-13; accord Alloc, Inc. v. Int’l Trade Comm’n, 342 F.3d 1361, 1368 (Fed.Cir.2003).

The claims themselves provide substantial guidance in determining the meaning of particular claim terms. Phillips, 415 F.3d at 1314. First, a term’s context in the asserted claim can be very instructive. Id. Other asserted or unas-serted claims can aid in determining the claim’s meaning because claim terms are typically used consistently throughout the patent. Id. Differences among the claim terms can also assist in understanding a term’s meaning. Id. For example, when a dependent claim adds a limitation to an independent claim, it is presumed that the independent claim does not include the limitation. Id. at 1314-15.

“[C]laims ‘must be read in view of the specification, of which they are a part.’ ” Id. at 1315 (quoting Markman v. Westview Instruments, Inc., 52 F.3d 967, 979 (Fed.Cir.1995) (en banc)). “[T]he specification ‘is always highly relevant to the claim construction analysis. Usually, it is dispositive; it is the single best guide to the meaning of a disputed term.’ ” Phillips, 415 F.3d at 1315 (quoting Vitronics Corp. v. Conceptronic, Inc., 90 F.3d 1576, 1582 (Fed.Cir.1996)); accord Teleflex, Inc. v. Ficosa N. Am. Corp., 299 F.3d 1313, 1325 (Fed.Cir.2002). This is true because a patentee may define his own terms, give a claim term a different meaning than the term would otherwise possess, or disclaim or disavow the claim scope. Phillips, 415 F.3d at 1316. In these situations, the inventor’s lexicography governs. Id. The specification may also resolve the meaning of ambiguous claim terms “where the ordinary and accustomed meaning of the words used in the claims lack sufficient clarity to permit the scope of the claim to be ascertained from the words alone.” Te-leflex, 299 F.3d at 1325. But, “[although the specification may aid the court in interpreting the meaning of disputed claim language, particular embodiments and examples appearing in the specification will not generally be read into the claims.” Comark Commc’ns, Inc. v. Harris Corp., 156 F.3d 1182, 1187 (Fed.Cir.1998) (quoting Constant v. Advanced Micro-Devices, Inc., 848 F.2d 1560, 1571 (Fed.Cir.1988)); accord, Phillips, 415 F.3d at 1323.

The prosecution history is another tool to supply the proper context for claim construction because a patent applicant may also define a term in prosecuting the patent. Home Diagnostics, Inc., v. LifeScan; Inc., 381 F.3d 1352, 1356 (Fed.Cir.2004) (“As in the case of the specification, a patent applicant may define a term in prosecuting a patent.”). “[T]he prosecution history (or file wrapper) limits the interpretation of claims so as to exclude any interpretation that may have been disclaimed or disavowed during prosecution in order to obtain claim allowance.” Standard Oil Co. v. Am. Cyanamid Co., 774 F.2d 448, 452 (Fed.Cir.1985);

Although extrinsic evidence can be useful, it is “less significant than the intrinsic record in determining the legally operative meaning of claim language.” Phillips, 415 F.3d at 1317 (citations and internal quotation marks omitted). Technical dictionaries and treatises may help a court understand the underlying technology and the manner in which one skilled in the art might use claim terms, but technical dictionaries and treatises may provide definitions that are too broad or may not be indicative of how the term is used in the patent. Id. at 1318. Similarly, expert testimony may aid a court in understanding the underlying technology and determining the particular meaning of a term in the pertinent field, but an expert’s conclusory, unsupported assertions as to a term’s definition are entirely unhelpful to a court. Id. Generally, extrinsic evidence is “less reliable than the patent and its prosecution history in determining how to read claim terms.” Id.

The Supreme Court of the United States has recently “read [35 U.S.C.] § 112, ¶ 2 to require that a patent’s claims, viewed in light of the specification and prosecution history, inform those skilled in the art about the scope of the invention with reasonable certainty.” Nautilus, Inc. v. Biosig Instruments, Inc., — U.S.-, 134 S.Ct. 2120, 2129, 189 L.Ed.2d 37 (2014). “A determination of claim indefiniteness is a legal conclusion that is drawn from the court’s performance of its duty as the construer of patent claims.” Datamize, LLC v. Plumtree Software, Inc., 417 F.3d 1342, 1347 (Fed.Cir.2005) (citations and internal quotation marks omitted), abrogated on other grounds by Nautilus, 134 S.Ct. 2120.

THE PARTIES’ STIPULATED TERMS

The parties have reached agreement on constructions for certain terms, as stated in their Joint Claim Construction and Pre-hearing Statement (Dkt. No. 54 at Ex. A) and their briefing (see, e.g., Dkt. No. 58 at 5). The parties’ agreements are set forth in Appendix A to this Claim Construction Memorandum and Order. •

CONSTRUCTION OF DISPUTED TERMS IN U.S. PATENTS NO. 5,590,403 AND 5,915,210

The ’403 Patent is titled “Method and System for Efficiently Providing Two Way Communication Between a Central Network and a Mobile Unit.” The ’403 Patent issued on December 31, 1996, and bears a filing date of November 12, 1992. In general, the ’403 Patent relates to dynamic reassignment of transmitters from one zone to another. The Abstract of the ’403 Patent states:

A two-way communication system for communication between a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers included in the network. The base transmitters are divided into zonal assignments and broadcast in simulcast using multi-carrier modulation techniques. The system network controls the base transmitters to broadcast in simulcast during both systemwide and zonal time intervals. The system network dynamically alters zone boundaries to maximize information throughput. The preferred mobile unit includes a noise detector circuit to prevent unwanted transmissions. The system network further provides an adaptive registration feature for mobile units which controls the registration operations by the mobile units to maximize information throughput.

The ’210 Patent is titled “Method and System for Providing Multicarrier Simulcast Transmission.” The ’210 Patent issued on June 22, 1999, and bears a filing date of July 24,1997. The ’210 Patent is a continuation of a continuation of the ’403 Patent. Because the ’403 Patent and the ’210 Patent therefore share a common written description and figures, the Court herein cites the specification of only the ’403 Patent. The Abstract of the ’210 Patent states:

A two-way communication system for communication betw[ ]een a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers included in the network. The base transmitters are divided into zonal assignments and broadcast in simulcast

using multi-carrier modulation techniques. The system network controls the base transmitters to broadcast in s[ ]imulcast during both systemwide and zone boundaries to maximize information throughout [sic, throughput]. The preferred mobile unit in[cl]udes a noise detector circuit to prevent unwanted transmissions. The system network further provides an adaptive registration feature for mobile units which controls the registration operation by the mobile units to maximize information throughout [sic, throughput].

The Court previously addressed the ’403 Patent in Mobile Telecommunications Technologies, LLC v. Clearwire Corp., et al, No. 2:12-CV-308-JRG-RSP, Dkt. No. 72, 2013 WL 3339050 (E.D.Tex. July 1, 2013) (referred to as the “Clearwire Order ” or simply “Clearwire ”).

The Court also addressed the ’403 Patent, the ’210 Patent, and the ’891 Patent in Mobile Telecommunications Technologies, LLC v. Sprint Nextel Corp., et al, Nos. 2:12-CV-832-JRG-RSP, Dkt. No. 162 (E.D.Tex. May 2, 2014) (“Sprint Order” or simply “Sprint”); see Civil Action Nos. 2:13-CV-258-JRG-RSP, 2:13-CV-259-JRG-RSP (consolidated with Sprint).

A. “transmitter^” and “base transmitter^]”

Plaintiff’s Proposed Construction Defendants’ Proposed Construction No construction necessary; plain and ordinary meaning plain and ordinary meaning, with the understanding that the Court has rejected [Plaintiffs] implication that transmitting multiple signals or outputs from a single structural unit can suffice as multiple transmitters

Dkt. No. 58 at 7; Dkt. No. 62 at 5. The parties submit that these disputed terms appear in Claims 1, 10, and 11 of the ’403 Patent and Claims 1 and 10 of the ’210 Patent. Dkt. No. 54, Ex. B at 1.

In Clearwire, the Court construed the terms “transmitter” and “base transmitter” in the ’403 Patent to have their plain and ordinary meaning. Clearwire, 2013 WL 3339050, at *2. The Court also found:

Although the Court recognizes that claims 1 and 10 are method claims, a person of ordinary skill in the art would understand the terms “transmitter” and “base transmitter” to refer to a structural unit, and thus, the number of transmitters in a given system or method is dependent on structure, not function. ... [T]he Court rejects [Plaintiffs] implication that transmitting multiple signals or outputs from a single structural unit can suffice as multiple transmitters.

Id. (citing ’403 Patent at 15:42-44). Nonetheless, the Court also “rejected] Clear-wire’s proposition that a ‘transmitter’ must be spatially separated or geographically dispersed from other transmitters, because Clearwire has provided no evidence to support reading such a limitation into the claims.” Id., at *3.

In Sprint, shortly before the March 7, 2014 claim construction hearing, the Court provided the parties with the following preliminary construction for these disputed terms: “Plain [meaning] ([e]xpressly adopt the Clearwire findings but do not provide them to the jury as part of a construction].” Sprint at 10. During the March 7, 2014 hearing, all parties in Sprint agreed to the Court adopting its preliminary construction. Id.

Shortly before the start of the October 21, 2014 hearing, the Court provided the parties with the following preliminary construction: “Plain meaning (Expressly adopt the Clearwire findings but do not provide them to the jury as part of a construction).”

(1) The Parties’Positions

Plaintiff argues that “[Defendants’] additional limitation imports out-of-context dicta from the Clearwire Order that is not applicable in this case. Here, neither party has proposed that transmitting multiple signals or outputs from a single transmitter can suffice as multiple transmitters.” Dkt. No. 58 at 7 (footnote omitted). Plaintiff nonetheless cites Claim 2 of the ’210 Patent, as well as disclosure in the ’891 Patent regarding “co-loeated transmitter” systems, to argue against any suggestion that “an entire accused device” must be deemed “a single structural unit.” Id. at 7-8.

Defendants respond that the Court should reach the same conclusion that it reached in Clearwire and that the Court preliminarily proposed — and that the parties, including Plaintiff, agreed to accept— in Sprint Dkt. No. 62 at 5-6. Defendants urge that “it is imperative that the Court integrate its finding into its formal construction for the jury. Failing to do so threatens to degrade the trial process into a sideshow where [Plaintiff] tests the Court’s limits on arguing its incorrect implication while [Defendants are] prevented from articulating the correct construction to the jury. The jury will be confused and the Court’s interpretation will be lost in the mix.” Dkt. No. 62 at 6. Alternatively, Defendants argue that “[a]t a minimum the Court should do as it did in the [Sprint ] case, namely by ‘[ejxpressly adopting] the Clearwire findings’ so as to prohibit [Plaintiff] from making arguments contrary to the Court’s findings.” Id. at 7 n.7.

Plaintiff replies by reiterating that “[tjhe Federal Circuit has held that dictum of a prior case which ‘involved a different dispute concerning the claim terms’ has no bearing on construction of the term absent that dispute.” Dkt. No. 64 at 1 (quoting Sandisk Corp. v. Memorex Prods., Inc., 415 F.3d 1278, 1290-1291 (Fed.Cir.2005)). Plaintiff also argues that “[ijnsertion of the phrase ‘the Court has rejected [Plaintiffs] implication’ ” would “inject explicit bias against [Plaintiff].” Id. at 2.

At the October 21, 2014 hearing, Defendants presented an alternative proposed construction: “separate structural units each transmitting at least one signal.”

(2) Analysis

Claim 1 of the ’210 Patent, which is representative for purposes of the present disputed terms, recites (emphasis added):

1. A multi-carrier simulcast transmission system for transmitting in a desired frequency band at least one message contained in an information signal, the system comprising:

a first transmitter configured to transmit a first plurality of carrier signals within the desired frequency band, each of the first plurality of carrier signals representing a portion of the information signal substantially not represented by others of the first plurality of carrier signals; and

a second transmitter, spatially separated from the first transmitter, configured to transmit a second plurality of carrier signals in simulcast with the first plurality of carrier signals, each of the second plurality of carrier signals corresponding to and representing substantially the same information as a respective carrier signal of the first plurality of carrier signals.

As Plaintiff has noted, Claim 2 of the ’210 Patent recites a “first transmitter” and a “second transmitter,” each of which comprises multiple transmitters:

2. The multi-carrier simulcast transmission system of claim 1, wherein the first transmitter comprises a plurality of transmitters located in a first area, and the second transmitter comprises a plurality of transmitters located in a second area.

Plaintiff has also cited the ’891 Patent, which discloses:

Alternative embodiments of co-located transmitter systems are also possible. For example, the co-located transmitter configurations discussed above can be expanded to support more than two data sources and transmit more than two carriers in the bandlimited channel.

’891 Patent at 4:7-11. Defendants properly point out, however, that the ’891 Patent is not related to the ’210 Patent. Dkt. No. 62 at 6 n.5. Moreover, as Defendants have argued, “that the reference needs to specify ‘co-located’ transmitters again only reinforces the Court’s prior ruling that transmitting multiple signals from a single structural unit does not constitute multiple transmitters.” Id.

At the October 21, 2014 hearing, Defendants argued that these disputed terms require that transmitters are geographically separated from one another. As noted above, Clearwire rejected such an argument. Moreover, Defendants in the present case did not present this argument in their brief. See Dkt. No. 62 at 5-7; see, e.g., CardSoft, LLC v. VeriFone, Inc., 769 F.3d 1114 (Fed.Cir.2014) (“Arguments that are not appropriately developed in a party’s briefing may be deemed waived.”). Defendants’ proposal of requiring geographic separation is therefore rejected.

On balance, the Court reaches the same conclusions here as in Clearwire. Those conclusions, however, need not be set forth in an explicit claim construction. Defendants’ proposal in that regard would tend to confuse rather than clarify the scope of the claims and is therefore hereby expressly rejected. Instead, the Court directs that at trial the parties cannot present any arguments inconsistent with the above-quoted conclusions reached in Clear-wire.

The Court therefore hereby construes “transmitters]” and “base transmit-ieres]” to have their plain meaning. The Court further hereby adopts the above-quoted conclusions reached in Clearwire and orders that at trial the parties shall not present any arguments inconsistent with those conclusions.

B. “set of transmitters” and “set of base transmitter[s]”

Dkt. No. 58 at 8; Dkt. No. 62 at 7. The parties submit that these disputed terms appear in Claims 1 and 10 of the ’403 Patent. Dkt. No. 54, Ex. B at 1.

Clearwire construed “set of transmitters” to mean “a set of at least two transmitters” and “set of base transmitters” to mean “a set of at least two base transmitters.” 2013 WL 3339050, at *3.

In Sprint, the Court found that “the use of the plural form of ‘transmitters’ demonstrates that a ‘set of transmitters’ requires two or more transmitters.” Sprint at 14 (citing Leggett & Platt, Inc. v. Hickory Springs Mfg. Co., 285 F.3d 1353, 1357 (Fed.Cir.2002)). The Court “thus reache[d] the same conclusion [in Sprint ] as in Clearwire.” Sprint at 14.

Shortly before the start of the October 21, 2014 hearing, the Court provided the parties with the following preliminary constructions: “set of transmitters” means “set[] of at least two transmitters” and “set of base transmitters” means “set of at least two base transmitters.”

(1) The Parties ’Positions'

Plaintiff argues that Defendants’ proposal should be rejected because “th[e] preferred embodiment of FIGS. 6 & 7 of the ’403 Patent describes a simple system using only two transmitters, one in a first set, and one in a second set, where the two sets are transmitting in simulcast during the first time period.” Dkt. No. 58 at 8. Further, Plaintiff argues, “Defendants’ construction requiring a particular number of transmitters in a set[] is contrary to [the] plain language of Claim 1, which does not require simulcast transmission among transmitters in a single set (hereafter, ‘intra-set simulcasting’), but rather only simulcast transmission among a first and second set (hereafter, ‘inter-set simulcasting’).” Id. at 10. Claim 10, by contrast, Plaintiff submits, expressly requires intra-set simulcasting. Id.

Defendants respond that because the Court in Sprint rejected the same arguments that Plaintiff presents again here, the Court should adopt its prior constructions. Dkt. No. 62 at 8.

Plaintiff replies that “grammatical formalism should not trump preferred embodiment disclosure in the specification. The plural object of a prepositional phrase does not always indicate two or more; for example, a ‘pair of pants’ is only one.” Dkt. No. 64 at 2.

At the October 21, 2014 hearing, the parties presented no oral argument on these disputed terms and instead rested on their briefing.

(2) Analysis

Claims 1 and 10 of the ’403 Patent recite (emphasis added):

1. A method for information transmission by a plurality of transmitters to provide broad communication capability over a region of space; the information transmission occurring during at least both a first time period and a second time period and the plurality of transmitters being divided into at least a first and second set of transmitters, the method comprising the steps of:

(a) generating a system information signal which includes a plurality of blocks of information;

(b) transmitting the system information signal to the plurality of transmitters;

(c) transmitting by the first and second sets of transmitters a first block of information in simulcast during the first time period;

(d) transmitting by the first set of transmitters a second block of information during the second time period; and

ie) transmitting by the second set of transmitters a third block of information during the second time period.

* * *

10. A method of communicating messages between a plurality of base transmitters and mobile receivers within a region of space divided into a plurality of zones with each zone having at least one base transmitter assigned thereto, the .communication method comprising the steps of:

(a) transmitting substantially simultaneously a first information signal and a second information signal to communicate messages to the mobile receivers, the first information signal being transmitted in simulcast by a first set of base transmitters assigned to a first zone, and the second information signal being transmitted in simulcast by a second set of base transmitters assigned to a second zone;

(b) dynamically reassigning one or more of the base transmitters in the first set of base transmitter [sic, transmitters] assigned to the first zone to the second set of base transmitters assigned to the second zone as a function of the messages to be communicated in an area, thereby creating an updated first set of base transmitters and an updated second set of base transmitters; and

(c) transmitting substantially simultaneously a third information signal and a fourth 'information signal, the third information signal being transmitted in simulcast by the updated first set of base transmitters, and the fourth information signal being transmitted in simulcast by the updated second set of base transmitters to communicate additional messages to said mobile receivers.

■ The specification discloses that “FIG. 6 shows an overview of the major elements of a preferred communication system according to the present invention.” ’403 Patent at 8:50-51 (emphasis added). Figure 6 is reproduced here:

The specification further discloses:

[T]he exemplary communication system shown in FIG. 6 may transfer the message to the mobile unit during one of two time intervals. In the first time interval, both base transmitter 612 and base transmitter 614 transmit data via antenna 620 and antenna 622, respectively, in simulcast to be received by mobile unit 624, which corresponds to step 706 in FIG. 7. This first alternative may be useful to deliver the message if, for example, the location of mobile unit 624 in zone 1 or zone 2 is unknown and broad coverage is desired. In the second time interval, base transmitter 614 transmits a block of information including the message data to mobile unit 624 and base transmitter 612 transmits another block of information, which corresponds to steps 708 and 710 of FIG. 7. This second alternative may be useful if, for example, the mobile unit 624 is known to be located in zone 1 and out of range of base transmitter 612. Delivery of the message to mobile unit 624 during the second time interval is advantageous because during message delivery to the mobile unit 624 by base transmitter 614, base transmitter 612 could be delivering a different message to a different mobile unit (not shown). As can be seen, this second alternative would increase information throughput and system efficiency.

’403 Patent at 10:40-62; see id. at 6:2-3 (“with each zone having at least one base transmitter assigned thereto”); see also id. at 9:42-43 (“Each zone must have one or preferably more transmitters assigned to it”).

As to extrinsic evidence, Plaintiff has cited a dictionary that defines “set” as meaning a “number of things of the same kind that belong or are used together.” Dkt. No. 58 at 9 (citing “Webster’s Dictionary”).

On one hand, “[ajbsent a clear disavowal in the specification or the prosecution history, the patentee is entitled to the full scope of its claim language.” Home Diagnostics, 381 F.3d at 1358.

On the other hand, in general the plural form of a noun refers to two or more, as found in Markem-Imaje Corp. v. Zipher Ltd., 657 F.3d 1293, 1297 (Fed.Cir.2011), and Leggett & Platt, 285 F.3d at 1357. The Court addressed these and other relevant cases in Calypso Wireless, Inc., et al. v. T-Mobile USA Inc., No. 2:08-CV-441, Dkt. No. 281 at 27-32, 2012 WL 7678386 (E.D.Tex. Dec. 3, 2012) (discussing Flash Seats, LLC v. Paciolan, Inc., No. 07-575-JJF, 2010 WL 184080 (D.Del. Jan. 19, 2010), aff'd, 469 Fed.Appx. 916 (Fed.Cir.2012), Every Penny Counts, Inc. v. Bank of Am. Corp., No. 2:07-CV-42-FTM-29SPC, 2008 WL 4491113 (M.D.Fla. Sept. 29, 2008), and MOAEC, Inc. v. Pandora Media, Inc., No. 07-CV-654-BBC, 2008 WL 4500704 (W.D.Wis. Sept. 30, 2008)).

On balance, the use of the plural form of “transmitters” demonstrates that a “set of transmitters” requires two or more transmitters. See, e.g., Leggett & Platt, 285 F.3d at 1357 (“At the outset, the claim recites ‘support wires’ in the plural, thus requiring more than one welded ‘support wire.’ ”). The Court thus reaches the same conclusion here as in Clearwire.

The Court accordingly hereby construes the disputed terms as set forth in the following chart:

“transmit ... in simulcast,” “transmitted ... in simulcast,” and “transmitting ... in simulcast”

Dkt. No. 58 at 12; Dkt. No. 62 at 8. The parties submit that these disputed terms appear in Claims 1 and 10 of the ’403 Patent and Claims 1, 10, and 19 of the ’210 Patent. Dkt. No. 54,-Ex. B at 1.

Clearwire construed these disputed terms in Claims 1 and 10 of the ’403 Patent as meaning “transmitting the same information at the same time.” 2013 WL 3339050, at *4. The Court also rejected any argument “that a single transmitter can operate in simulcast with itself by using multi-carrier modulation.” Id., at *5.

In Sprint, shortly before the March 7, 2014 claim construction hearing, the Court provided the parties with the following preliminary construction for these disputed terms: “ ‘transmitting the same information at the same time’ (expressly adopt the Clearwire findings but do not provide them to the jury as part of a eonstruction[) ].” Sprint at 15 (square brackets omitted). During the March 7, 2014 hearing, all parties in Sprint agreed to the Court adopting its preliminary construction. Id.

Shortly before the start of the October 21, 2014 hearing, the Court provided the parties with the following preliminary construction: ‘[transmit / transmitted / transmitting] ... the same information at the same time’ (Expressly adopt the Clear-wire findings but do not provide them to the jury as part of a construction).”

(1) The Parties ’Positions

Plaintiff argues that Defendants’ proposal should be rejected because “the asserted claims of the ’403 Patent do not concern a plurality of carrier signals” and, “in light of the remainder of the claim language of the ’210 Patent, [Defendants’ proposed] construction is incorrect and superfluous because the limitations placed on the plurality of carriers is explicitly defined in the remainder of each asserted claim.” Dkt. No. 58 at 13. As to multi-carrier modulation, Plaintiff argues that there is no claim construction dispute because “[Plaintiff] does not contend that a single transmitter simulcasts with itself.” Id. Instead, Plaintiff argues, “[t]here is an infringement question for the jury as to whether the accused ... devices and networks include more than one transmitter, and that term is separately being construed by the Court.” Id. Moreover, Plaintiff argues that “Defendants’ proposal should be rejected because it introduces terms from the specification that would require additional explanation to the jury. A reference to multi-carrier modulation is unlikely to help a juror understand simulcasting, which is already captured by the construction ‘transmitting the same information at the same time.’ ” Id. at 13-14.

Defendants respond that the construction should include “a recognition that simulcasting involves modulating the same underlying information signal over multiple carriers” and “clarification that a transmitter cannot operate in simulcast with itself.” Dkt. No. 62 at 8-9. Defendants emphasize that “in every case [in the specification], there is one information signal — the same signal — modulated onto multiple carriers.” Id. at 9. Finally, Defendants submit:

The Court in Clearwire correctly distinguished between transmitting the same information and transmitting the same signals. See Clearwire Order at 9. The Court pointed out that the transmitted signals would, at least in some cases, not be identical due, for example, to offsets in carrier frequencies used to prevent interference. Id. Consistent with this, [Defendants are] not proposing that the transmitted signals must be identical, but rather that the underlying information signal (that is modulated onto the carriers to create the transmitted signals) must be the same for simulcasting to occur.

Dkt. No. 62 at 11. Finally, Defendants reiterate that in Clearwire the Court “rejected “[Plaintiffs] implication that transmitting multiple signals or outputs from a single structural unit can suffice as multiple transmitters.” Id. (quoting 2013 WL 3339050, at *3). Defendants argue that this finding “should be part of the formal construction.” Dkt. No. 62 at 12.

Plaintiff replies that “[including references to both ‘the same information’ and ‘the same information signal’ would mislead a jury into requiring that the same information and the same signal are being transmitted at the same time, which would effectively undue the Patent’s distinction— recognized by this Court — between information and signal.” Dkt. No. 64 at 3. Plaintiff also notes that “Claim 1 refers to the information signal as being transmitted to the transmitters, not from them.” Id. Further, Plaintiff argues, adding “a plurality of carrier signals” to the construction would be superfluous in the claims of the ’210 Patent and would add a “new concept ... to at least Claim 1 of the ’403 Patent.” Id. at 4.

At the October 21, 2014 hearing, Defendants presented an alternative proposed construction: “transmitting the same information at the same time from a plurality of transmitters modulating with the same information signal.” Defendants reiterated that they are not arguing that the signal coming out of each transmitters must be the same. For example, Defendants submitted that there may be a frequency offset. See ’403 Patent at 2:11-19 & 13:38-47. Instead, Defendants argued, the information signal going into each transmitter must be the same. Defendants submitted that the specification contains no disclosure of providing different information signals to the transmitters for simulcasting.

(2) Analysis

As a threshold matter, the Court hereby adopts its prior rejection, in Clearwire, of any argument “that a single transmitter can operate in simulcast with itself by using multi-carrier modulation.” 2013 WL 3339050, at *5. Nonetheless, Defendants’ proposed construction in this regard is unnecessary and is rejected as tending to confuse rather than clarify the scope of the claims. Instead, the Court hereby directs that at trial the parties cannot present any arguments inconsistent with the above-quoted conclusion reached in Clearwire.

Claims 1 and 10 of the ’403 Patent are reproduced in the discussion of the “set of transmitters” terms, above.

Claims 1, 10, and 19 of the ’210 Patent recite (emphasis added):

1. A multi-carrier simulcast transmission system for transmitting in a desired frequency band at least one message contained in an information signal, the system comprising:

10. In a multi-carrier simulcast transmission system, a method for transmitting in a desired frequency band at least one message contained in an information signal, the method comprising the steps of:

generating a first plurality of carrier signals within the desired frequency band, each of the first plurality of carrier signals representing a portion of the information signal substantially not represented by others of the first plu[ra]lity of carrier signals;

generating a second plurality of carrier signals within the desired frequency band, each of the second plurality of carrier signals corresponding to and representing substantially the same information as a respective carrier signal of the first plurality of carrier signals;

transmitting the first plurality of carrier signals from a first transmitter; transmitting the second plurality of carrier signals from a second

transmitter in simulcast with transmission of the first plurality of carrier signals from the first transmitter.

19. A multi-carrier simulcast transmission system for transmitting in a desired frequency band at least one message contained in an information signal, the system comprising:

means for transmitting a first plurality of carrier signals within the desired frequency band, each of the first plurality of carrier signals representing a portion of the information signal substantially not represented by others of the first plurality of carrier signals; and

means for transmitting a second plurality of carrier signals in simulcast with the first plurality of carrier signals, each of the second plurality of carrier signals corresponding to and representing substantially the same information as a respective carrier signal of the first plurality of carrier signals.

The Background of the Invention states:

However, in “overlap” areas D, E, and F shown in FIG. 1, where the signals from two or more transmitters -are approximately equal, problems can arise because destructive interference of signals occurs in these overlap areas such as areas D, E, and F. Destructive interference occurs when the two signals are equal in magnitude and 180° out of phase and completely cancel each other. While there were some successes, reliable design procedures were not available.

Attempting to precisely synchronize the carrier frequencies of all simulcast transmitters does not overcome the problem because points (Le.nodes) at which destructive summing occurred persisted for long periods of time. At such points, a mobile receiver can not receive the simulcast signal.

Deliberately offsetting the carrier frequencies of adjacent transmitters can ensure that destructive interference does not persist at one point for an extended period of time. The slight errors in frequency displayed by high quality reference oscillators (e.g., 20 hertz errors in 100 MHz signals or a few parts in 10) render deliberate offsetting unnecessary.

’403 Patent at 1:64-2:16 (emphasis added); see id. at 3:63-65 (“Simulcast operation avoids the need for scanning and retuning as the mobile unit moves between areas”). The specification further discloses:

As explained in the Background of the Invention section, if base transmitters 612 and 614 are broadcasting identical signals on the same frequencies in simulcast, good reception by a receiver located near the dashed line 660, and possibly in an overlap area (not shown), can be achieved. Simulcast thus may provide uniform transmitter coverage for the region shown in FIG. 6. However, if base transmitter 612 is broadcasting a first information signal and base transmitter 614 is broadcasting a different, second information signal on identical frequencies simultaneously, it will likely be difficult for a receiver located in the overlap area to receive either the first or the second information signal. In this instance, the overlap area may be referred to as an interference area because a receiver in this area would receive a composite signal, including the first and second information signal, that would likely be unusable.

Id. at 10:3-9 (emphasis added).

It should also be understood that in accordance with good simulcast practice, the respective carrier frequencies between adjacent base transmitters, such as base transmitter 612 and base transmitter 614 in FIG. 6, should be slightly offset to prevent sustained nodes or “dead spots” where destructive interference between the signals from each transmitter provides an unusable composite signal, as was explained in the background section of this application. This frequency offset is preferably on the order of 10-20 hertz.

Id. at 13:39-47.

In accordance with the invention, a preferred method 2600 for accomplishing zonal redefinition is shown in FIG. 26. In accordance with the method, step 2602 provides for transmitting substantially simultaneously a first information signal and a second information signal, the first information signal being transmitted in simulcast by a first set of base transmitters assigned to a first zone, and the second information signal being transmitted in simulcast by a second set of base transmitters assigned to a second zone. For example, as shown in FIG. 25, the base transmitters in zone 1 defined by boundary line 2502 could be the first set of base transmitters, and the base transmitters located in zone 2 defined by boundary line 2504 could be the second set of base transmitters.

Id. at 24:39-47 (emphasis added).

On balance, Defendants have failed to adequately support their proposal of “modulating a plurality of carrier signals by the same information signal.” In particular, whereas some claim limitations use the term “information signal,” others also refer to merely “information.” Compare ’403 Patent at Claims 1 & 10 (“information signal”) with ’210 Patent at Claims 1, 10 & 19 (“information signal” and “information”). Defendants’ proposal, which would require an “information signal” in all limitations, is therefore rejected.

The Court accordingly hereby construes “transmit ... in simulcast,” “transmitted ... in simulcast,” and “transmitting ... in simulcast” to mean “[transmit / transmitted / transmitting] ... the same information at the same time.” The Court further hereby adopts the above-quoted conclusions reached in Clearwire and orders that at trial the parties shall not present any arguments inconsistent with those conclusions.

D. “block of information”

Dkt. No. 58 at 14. The parties submit that this disputed term appears in Claim 1 of the ’403 Patent. Dkt. No. 54, Ex. B at 1.

Plaintiff has argued that “[t]he term ‘block of information’ is commonly understood in the art, clear on its face, and therefore does not require construction.” Dkt. No. 58 at 14. Plaintiff has also noted that the only disclosure regarding an “electromagnetic” signal is with reference to a potentially interfering signal. Id. at 15. Further, Plaintiff has argued, rather than comprising a message or messages, “the specification specifically discloses that blocks of information are a smaller part of an electronic message.” Id. (citing ’403 Patent at 10:23-27).

Defendants responded:

With respect to the term “block [of] information,” for which the parties previously had a dispute, [Defendants] note[] that in arguing what the plain meaning of “block [of] information” should be, [Plaintiff] proposes the following in its brief: “The term ‘block of information’ is sufficiently explained in the claim language as well as the specification: a system information signal includes a plurality of blocks of information which, in the aggregate, include an' electronic message.” Dkt. 58 ... at 14 (emphasis added). [Defendants] agree[ ] that “block [of] information” is a discrete portion of a system information signal. Therefore, so as to narrow disputes, [Defendants] withdrawn [their] proposed construction, such that both parties propose plain meaning.

Dkt. No. 62 at 5 n.2.

Plaintiff has replied by noting that “[Defendants] agree[] that the Court should afford this term its plain and ordinary meaning.” Dkt. No. 64 at 4.

This agreement between the parties is set forth in Appendix A to this Claim Construction Memorandum and Order.

CONSTRUCTION OF DISPUTED TERMS IN U.S. PATENT NO. 5,659,891

The ’891 Patent is titled “Multicarrier Techniques in Bandlimited Channels.” The ’891 Patent issued on August 19, 1997, and bears a filing date of'June 7, 1995. In general, the ’891 Patent relates to operating more than one carrier within a single channel. The Abstract of the ’891 Patent states:

A method of multicarrier modulation using co-located transmitters to achieve higher transmission capacity for mobile paging and two-way digital communication in a manner consistent with FCC emission mask limits. Co-location of the transmitters obviates the need for stringent, symmetrical subchannel interference protection and provides for a wider ■range of operating parameters, including peak frequency deviation, bit rate, and carrier frequencies, to obtain optimal transmission performance.

The Court addressed the ’891 Patent in Sprint, and relevant findings therein are set forth as to particular disputed terms below.

A. “single mask-defined, bandlimited channel”

[Editor’s Note: The preceding image contains the reference for footnote].

Dkt. No. 58 at 16; Dkt. No. 62 at 12; see Dkt. No. 64 at 4. The parties submit that this disputed term appears in Claims 1, 3, and 5 of the ’891 Patent. Dkt. No. 54, Ex. B at 3.

In Sprint, the parties agreed to construe this term to mean “a channel confined to a frequency range.” Sprint at 76.

Shortly before the start of the October 21, 2014 hearing, the Court provided the parties with the following preliminary construction: “a channel confined to a frequency range.”

(1) The Parties’Positions

Plaintiff argues that “FCC paging requirements” are not set forth in the specification and, moreover, “[t]he word ‘paging’ in Claims 1, 3, and 5 of the ’891 Patent is only used in the non-limiting preamble.” Dkt. No. 58 at 16. Plaintiff also notes that the Federal Communications Commission (“FCC”) is not mentioned anywhere in the specification and “emission masks are used by various organizations, such as the IEEE for example.” Id. at 17. Further, Plaintiff argues, “[a]dding this new limitation would create difficulties for a jury because it would require the jury to understand numerous complex topics regarding emission masks, spectral densities, and at-tenuations and the like, when it is only the effect of these complexities, the relative confinement of the channel, which is relevant to the claims. It is unnecessary to so complicate the claim language, because the precise requirements of the claimed channel are explicitly recited in the remainder of the independent claims.” Id. (footnote omitted).

Defendants respond that “[mjeeting FCC regulations is emphasized repeatedly in the patent.” Dkt. No. 62 at 13. Defendants also note that “ ‘47 C.F.R. § 22.106 (1994),’ the relevant FCC regulations for emissions masks, is listed on the face of the patent as one of the references cited.” Id. at 14. Likewise, Defendants cite an Information Disclosure Statement, filed during prosecution of the ’891 Patent, in which the patentee referred to an FCC regulation. Id.

Plaintiff replies that “the FCC is not mentioned in any of the claims of the ’891 Patent, and the patent specification — while explaining the background of the invention in relation to FCC requirements — carefully avoids importing any regulatory limitation into the claimed invention.” Dkt. No. 64 at 5. Plaintiff emphasizes that “in the ‘Detailed Description of the Preferred Embodiments,’ the only reference to paging is in the description of one of the preferred embodiments, which the specification clarifies is ‘purely exemplary.’ ” Id. (citing ’891 Patent at 4:53-55). As to the prosecution history, Plaintiff argues that the patentee nowhere defined the invention as limited to paging. Id. at 5-6.

(2) Analysis

Claim 5 of the ’891 Patent is representative for purposes of the present disputed term and recites (emphasis added):

5. In a paging system having a plurality of transmitters transmitting a plurality of modulated carriers over a single mask-defined, bandlimited channel and a plurality of mobile receiving units independently receiving one of said plurality of carriers, a method of operating said plurality of carriers in said channel to achieve higher transmission capacity comprising the steps of:

co-locating said plurality of transmitters such that said plurality of carriers can be emanated from the same transmission source; and

transmitting said plurality of carriers over a plurality of subchannels spaced within the mask defining said channel wherein the frequency difference between the center frequency of the outer most carriers and the band edge of said mask is greater than half the frequency difference between the center frequencies of each adjacent carrier.

Thus, although the preamble of this claim refers to a “paging system,” the claim does not refer to FCC requirements.

In some cases, description of the “invention” .in the specification has been found to be limiting. See, e.g., Honeywell Int’l, Inc. v. ITT Indus., 452 F.3d 1312, 1318 (Fed.Cir.2006) (“On at least four occasions, the written description refers to the fuel filter as ‘this invention’ or ‘the present invention’ ... The public is entitled to take the pat-entee at his word and the word was that the invention is a fuel filter.”); see also SciMed Life Sys., Inc. v. Advanced Cardiovascular Sys., Inc., 242 F.3d 1337, 1343 (Fed.Cir.2001) (“the characterization of the coaxial configuration as part of the ‘present invention’ is strong evidence that the claims should not be read to encompass the opposite structure”); Verizon Servs. Corp. v. Vonage Holdings Corp., 503 F.3d 1295, 1308 (Fed.Cir.2007) (“When a patent thus describes the features of the ‘present invention’- as a whole, this description limits the scope of the invention.”).

The Abstract of the ’891 Patent refers to paging and the FCC (emphasis added):

The Description of Related Art likewise states:

The rising popularity of mobile paging services has resulted in increased competition for air time on the limited number of radiofrequency channels allocated by the Federal Communications Commission (FCC) for mobile paging use.

Id. at 1:11-14 (emphasis added); see id. at 1:22-24 (“Channels assigned by the FCC to radio paging providers typically have narrow bandwidths (e.g. 25 kHz) and are subject to stringent emission mask limitations.”); see also id. at 1:39-46 (“compliance with FCC mask requirements”).

The FCC requires signals to be confined within emission limit masks in order to prevent interference caused by signals straying or spilling into adjacent channels. FCC masks typically require the power spectral density of a signal to be attenuated at least 70 dB at the band edge. Despite these stringent constraints, some carrier overlap can be expected, even when the maximum carrier spacing consistent with the FCC mask requirements is utilized. Such overlap can result in unacceptable interference of the carriers, making it difficult for the receivers to acquire the proper carrier.

Id. at 1:57-64. The specification then discloses:

In accordance with the present invention, these and other [operating] parameters can be adjusted so that the carriers generated and transmitted according to the present invention will remain within the FCC emission limits while providing optimal transmission performance.

Id. at 4:41-46.

In the modulation technique of the present invention, carriers operating at different frequencies are fit within a single bandwidth allocation in a manner consistent with FCC mask requirements.

Id. at 5:15-19; see id. at 3:16-18 (“FIG. 4 is a graph depicting an exemplary FCC emissions mask that requires the power spectral density to be attenuated at least 70 dB within 10kHz from center frequency.”); see also id. at 4:12-15, 4:47-53 & 4:61-63.

On balance, the above-cited Honeywell case and similar cases are inapplicable because although the above-quoted and above-cited disclosures suggest that the claimed invention may be useful in a paging system, the specification does not state that the invention is limited to “paging” channels or channels “defined by FCC paging requirements,” as Defendants have proposed.

As for the prosecution history, Defendants have emphasized that the patentee submitted an Information Disclosure Statement (“IDS”) disclosing 47 C.F.R. § 22.106 (1994). Dkt. No. 62, Ex. 10, Information Disclosure Statement Under 37 C.F.R. § 1.97(b). Defendants have not demonstrated, however, that the IDS gave rise to any clear and unmistakable disclaimer. See Omega Eng’g v. Raytek Corp., 334 F.3d 1314, 1324 (Fed.Cir.2003) (“As a basic principle of claim interpretation, prosecution disclaimer promotes the public notice function of the intrinsic evidence and protects the public’s reliance on definitive statements made during prosecution.”) (emphasis added); id. at 1325-26 (“[F]or prosecution disclaimer to attach, our precedent requires that the alleged disavowing actions or statements made during prosecution be both clear and unmistakable.”) (emphasis added).

Finally, at the October 21, 2014 hearing, Defendants urged that the Clearwire construction, proposed here by Plaintiff, perhaps gives meaning to “bandlimited channel” but fails to give meaning to “mask-defined.” See Bicon, Inc. v. Straumann Co., 441 F.3d 945, 950 (Fed.Cir.2006) (“[C]laims are interpreted with an eye toward giving effect to all terms in the claim.”). On balance, “bandlimited” has been given appropriate meaning through the “frequency range” portion of the Cle-arwire construction, and “mask-defined” has been given appropriate meaning through the “confined” portion of the Cle-arwire construction. That is, whereas “bandlimited” refers to a range of frequencies,” “mask-defined” refers to the mask that confines a signal to that range, such as the edge-attenuated mask illustrated in Figure 4. See ’891 Patent at 1:57-67 & 4:27-54 & Fig. 4.

The Court therefore hereby expressly rejects Defendants’ proposal of limiting the disputed term to “meeting the FCC. paging requirements.” The Court also rejects Defendants’ proposal, at the October 21, 2014 hearing, of including in the construction a reference to particular federal regulations, such as 47 C.F.R. § 22.106 (1994). See Dkt. No. 62, Ex. 10, Information Disclosure Statement Under 37 C.F.R. § 1.97(b).

The Court accordingly hereby construes “single mask-defined, band-limited channel” to mean “a channel confined to a frequency range.”

B. “independently receiving one of said plurality of carriers”

Dkt. No. 58 at 18; Dkt. No. 62 at 15. The parties submit that this disputed term appears in Claim 5 of the ’891 Patent. Dkt. No. 54, Ex. B at 3.

Shortly before the start of the October 21, 2014 hearing, the Court provided the parties with the following preliminary construction: “Plain meaning.”

(1) The Parties ’ Positions

Plaintiff argues that the prosecution history relied upon by Defendants does not support Defendants’ proposed construction because the prior art reference at issue, United States Patent No. 3,488,445 (“Chang”) “differs from the ’891 patent by involving the simultaneous receipt of multiplexed orthogonal carriers over a simple transmission line.” Dkt. No. 58 at 19. “The ’891 Patent, on the other hand,” Plaintiff argues, “claims that a plurality [of] mobile receiving units independently receive one subcarrier. Whether or not the plurality of mobile units also receive any additional subcarriers is irrelevant to the claim.” Id. Further, Plaintiff submits, “Applicants had no reason to make a statement ... to limit how many subcarriers were received by the claimed invention, because the examiner found that the admitted prior art had already taught the limitation of ‘a plurality of mobile receiving units independently receiving one of the plurality of carriers.’ ” Id.

Defendants respond that “[b]y arguing that the claim allows receiving more than one carrier, [Plaintiff] seeks to re-write the claim by replacing the phrase ‘independently receiving one’ with the phrase ‘receiving one or more.’ ” Dkt. No. 62 at 15. Defendants also cite the above-mentioned prosecution history involving the Chang reference, arguing that the patentee “disclaimed any construction of ‘independently receiving one’ that would encompass ‘re-ceiv[ing] the entire frequency spectrum of all the channels’ ” Id. at 16 (quoting id., Ex. 14, 8/9/1996 Amendment at 6) (emphasis Defendants’). Finally, Defendants argue that “[i]f [Defendants’] refinement is not adopted, then the claim will be indefinite as it will not be clear what scope the phrase ‘independently receiving one’ will have, consistent with the prosecution history.” Id. at 16 n.12.

Plaintiff replies that “Chang ... requires receipt of the entire frequency spectrum of all channels while the ’891 Patent claims that a plurality of mobile receiving units may independently receive a subcar-rier.” Dkt. No. 64 at 7.

At the October 21, 2014 hearing, the parties presented no oral argument on this disputed term and instead rested on their briefing.

(2) Analysis

Claim 5 of the ’891 Patent recites (emphasis added):

5. In a paging system having a plurality of transmitters transmitting a plurality of modulated carriers over a single mask-defined, bandlimited channel and a plurality of mobile receiving units independently receiving one of said plurali ty of carriers, a method of operating said plurality of carriers in said channel to achieve higher transmission capacity comprising the steps of:

co-locating said plurality of transmitters such that said plurality of carriers can be emanated from the same transmission source; and

Defendants are correct, as a general matter, that “[t]he purpose of consulting the prosecution history in construing a claim is to exclude any interpretation that was disclaimed during prosecution.” Chi-mie v. PPG Indus., Inc., 402 F.3d 1371, 1384 (Fed.Cir.2005) (citation and internal quotation marks omitted).

The examiner rejected the claim at issue as “unpatentable over the prior art admitted by the Applicant in view of Chang

As to claim 5, pages 1-3 of the admitted prior art teaches all what is claimed, except transmitting the plurality of carriers over a plurality of subchannels spaced asymmetrically within the mask defining the channel. Chang teaches what is claimed in col. 1, lines 60-68 where asymmetry reads on overlap.

Dkt. No. 62, Ex. 13, 2/9/1996 Office Action at 3. As a threshold matter, Plaintiffs argument that “Applicants had no reason to make a statement ... to limit how many subcarriers were received” is of minimal persuasive weight, if any, because the issue of disclaimer ultimately turns on what the patentee stated. See Andersen Corp. v. Fiber Composites, LLC, 474 F.3d 1361, 1374 (Fed.Cir.2007) (“An applicant’s invocation of multiple grounds for distinguishing a prior art reference does not immunize each of them from being used to construe the claim language. Rather, as we have made clear, an applicant’s argument that a prior art reference is distinguishable on a particular ground can serve as a disclaimer of claim scope even if the applicant distinguishes the reference on other grounds as well.”).

The patentee responded as follows, in relevant part:

Chang does not disclose a “plurality of mobile receiving units independently receiving one of said plurality of carriers,” as required by Applicants’ claim 5. Nor does Chang disclose a method of transmitting a plurality of carriers over a plurality of “subchannels” that are asymmetrically located “within the mask defining said channel.” Each “channel” of Chang of a particular orthogonality is non-overlapped with an adjacent channel of the same orthogonality. There is no teaching in Chang of “subchannels,” as required by the mobile receiver paging system of claim 5. Accordingly, to receive any one channel in Chang, a mobile receiving unit would need to receive the entire frequency spectrum of all the channels. This is directly contrary to the requirements of claim 5.

Id., Ex. 14, 8/9/1996 Amendment at 6 (emphases modified). That is, in more common parlance, the patentee distinguished the Chang reference as lacking disclosure of the ability to “tune” to a particular subchannel.

The patentee thus explained that, the claim requires a capability of receiving a particular channel regardless of whether other channels are received. This meaning is readily evident from the language of the disputed term itself.

Thus, Defendants’ proposal of limiting the claim to receiving one and only one channel is an unwarranted extrapolation from what the patentee actually argued, as set forth above. See Omega, 334 F.3d at 1324 (“As a basic principle of claim interpretation, prosecution disclaimer promotes the public notice function of the intrinsic evidence and protects the public’s rebanee on definitive statements made during prosecution.”) (emphasis