Full opinion text
Justice Kennedy delivered the opinion of the Court, except as to Parts II-B-2 and II-C-2. The question in this case turns on whether a patent can be issued for a claimed invention designed for the business world. The patent application claims a procedure for instructing buyers and sellers how to protect against the risk of price fluctuations in a discrete section of the economy. Three arguments are advanced for the proposition that the claimed invention is outside the scope of patent law: (1) It is not tied to a machine and does not transform an article; (2) it involves a method of conducting business; and (3) it is merely an abstract idea. The Court of Appeals ruled that the first mentioned of these, the so-called machine-or-transformation test, was the sole test to be used for determining the patent-ability of a “process” under the Patent Act, 35 U. S. C. § 101. I Petitioners’ application seeks patent protection for a claimed invention that explains how buyers and sellers of commodities in the energy market can protect, or hedge, against the risk of price changes. The key claims are claims 1 and 4. Claim 1 describes a series of steps instructing how to hedge risk. Claim 4 puts the concept articulated in claim 1 into a simple mathematical formula. Claim 1 consists of the following steps: “(a) initiating a series of transactions between said commodity provider and consumers of said commodity wherein said consumers purchase said commodity at a fixed rate based upon historical averages, said fixed rate corresponding to a risk position of said consumers; “(b) identifying market participants for said commodity having a counter-risk position to said consumers; and “(c) initiating a series of transactions between said commodity provider and said market participants at a second fixed rate such that said series of market participant transactions balances the risk position of said series of consumer transactions.” App. 19-20. The remaining claims explain how claims 1 and 4 can be applied to allow energy suppliers and consumers to minimize the risks resulting from fluctuations in market demand for energy. For example, claim 2 claims “[t]he method of claim 1 wherein said commodity is energy and said market participants are transmission distributors.” Id., at 20. Some of these claims also suggest familiar statistical approaches to determine the inputs to use in claim 4’s equation. For example, claim 7 advises using well-known random analysis techniques to determine how much a seller will gain “from each transaction under each historical weather pattern.” Id., at 21. The patent examiner rejected petitioners’ application, explaining that it “ ‘is not implemented on a specific apparatus and merely manipulates [an] abstract idea and solves a purely mathematical problem without any limitation to a practical application, therefore, the invention is not directed to the technological arts.’” App. to Pet. for Cert. 148a. The Board of Patent Appeals and Interferences affirmed, concluding that the application involved only mental steps that do not transform physical matter and was directed to an abstract idea. Id., at 181a-186a. The United States Court of Appeals for the Federal Circuit heard the case en banc and affirmed. The case produced five different opinions. Students of patent law would be well advised to study these scholarly opinions. Chief Judge Michel wrote the opinion of the court. The court rejected its prior test for determining whether a claimed invention was a patentable “process” under § 101— whether it produces a “'useful, concrete and tangible result’” — as articulated in State Street Bank & Trust Co. v. Signature Financial Group, Inc., 149 F. 3d 1368, 1373 (1998), and AT&T Corp. v. Excel Communications, Inc., 172 F. 3d 1352, 1357 (1999). See In re Bilski, 545 F. 3d 943, 959-960, and n. 19 (CA Fed. 2008) (en banc). The court held that “[a] claimed process is surely patent-eligible under § 101 if: (1) it is tied to a particular machine or apparatus, or (2) it transforms a particular article into a different state or thing.” Id., at 954. The court concluded this “machine-or-transformation test” is “the sole test governing § 101 analyses,” id., at 955, and thus the “test for determining patent eligibility of a process under §101,” id., at 956. Applying the machine-or-transformation test, the court held that petitioners’ application was not patent eligible. Id., at 963-966. Judge Dyk wrote a separate concurring opinion, providing historical support for the court’s approach. Id., at 966-976. Three judges wrote dissenting opinions. Judge Mayer argued that petitioners’ application was “not eligible for patent protection because it is directed to a method of conducting business.” Id., at 998. He urged the adoption of a “technological standard for patentability.” Id., at 1010. Judge Rader would have found petitioners’ claims were an unpatentable abstract idea. Id., at 1011. Only Judge Newman disagreed with the court’s conclusion that petitioners’ application was outside of the reach of § 101. She did not say that the application should have been granted but only that the issue should be remanded for farther proceedings to determine whether the application qualified as patentable under other provisions. Id., at 997. This Court granted certiorari. 556 U. S. 1268 (2009). II A Section 101 defines the subject matter that may be patented under the Patent Act: “Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title.” Section 101 thus specifies four independent categories of inventions or discoveries that are eligible for protection: processes, machines, manufactures, and compositions of matter. “In choosing such expansive terms .. . modified by the comprehensive ‘any,’ Congress plainly contemplated that the patent laws would be given wide scope.” Diamond v. Chakrabarty, 447 U. S. 303, 308 (1980). Congress took this permissive approach to patent eligibility to ensure that “ ‘ingenuity should receive a liberal encouragement.’” Id., at 308-309 (quoting 5 Writings of Thomas Jefferson 75-76 (H. Washington ed. 1871)). The Court’s precedents provide three specific exceptions to § 101’s broad patent-eligibility principles: “laws of nature, physical phenomena, and abstract ideas.” Chakrabarty, supra, at 309. While these exceptions are not required by the statutory text, they are consistent with the notion that a patentable process must be “new and useful.” And, in any case, these exceptions have defined the reach of the statute as a matter of statutory stare *decisis going back 150 years. See Le Roy v. Tatham, 14 How. 156, 174-175 (1853). The concepts covered by these exceptions are “part of the storehouse of knowledge of all men . . . free to all men and reserved exclusively to none.” Funk Brothers Seed Co. v. Kalo Inoculant Co., 333 U. S. 127, 130 (1948). The § 101 patent-eligibility inquiry is only a threshold test. Even if an invention qualifies as a process, machine, manufacture, or composition of matter, in order to receive the Patent Act’s protection the claimed invention must also satisfy “the conditions and requirements of this title.” §101. Those requirements include that the invention be novel, see §102, nonobvious, see § 103, and fully and particularly described, see § 112. The present case involves an invention that is claimed to be a “process” under §101. Section 100(b) defines “process” as: “process, art or method, and includes a new use of a known process, machine, manufacture, composition of matter, or material.” The Court first considers two proposed categorical limitations on “process” patents under § 101 that would, if adopted, bar petitioners’ application in the present case: the machine- or-transformation test and the categorical exclusion of business method patents. B 1 Under the Court of Appeals’ formulation, an invention is a “process” only if: “(1) it is tied to a particular machine or apparatus, or (2) it transforms a particular article into a different state or thing.” 545 F. 3d, at 954. This Court has “more than once cautioned that courts 'should not read into the patent laws limitations and conditions which the legislature has not expressed.’ ” Diamond v. Diehr, 450 U. S. 175, 182 (1981) (quoting Chakrabarty, supra, at 308; some internal quotation marks omitted). In patent law, as in all statutory-construction, “[ujnless otherwise defined, ‘words will be interpreted as taking their ordinary, contemporary common meaning.’” Diehr, supra, at 182 (quoting Perrin v. United States, 444 U. S. 37, 42 (1979)). The Court has read the § 101 term “manufacture” in accordance with dictionary definitions, see Chakrabarty, supra, at 308 (citing American Fruit Growers, Inc. v. Brogdex Co., 283 U. S. 1, 11 (1931)), and approved a construction of the term “composition of matter” consistent with common usage, see Chakrabarty, supra, at 308 (citing Shell Development Co. v. Watson, 149 F. Supp. 279, 280 (DC 1957)). Any suggestion in this Court’s case law that the Patent Act’s terms deviate from their ordinary meaning has only been an explanation for the exceptions for laws of nature, physical phenomena, and abstract ideas. See Parker v. Flook, 437 U. S. 584, 588-589 (1978). This Court has not indicated that the existence of these well-established exceptions gives the Judiciary carte blanche to impose other limitations that are inconsistent with the text and the statute’s purpose and design. Concerns about attempts to call any form of human activity a “process” can be met by making sure the claim meets the requirements of § 101. Adopting the machine-or-transformation test as the sole test for what constitutes a “process” (as opposed to just an important and useful clue) violates these statutory interpretation principles. Section 100(b) provides that “[t]he term ‘process’ means process, art or method, and includes a new use of a known process, machine, manufacture, composition of matter, or material.” The Court is unaware of any “ ‘ordinary, contemporary, common meaning,’” Diehr, supra, at 182, of the definitional terms “process, art or method” that would require these terms to be tied to a machine or to transform an article. Respondent urges the Court to look to the other patentable categories in § 101 — machines, manufactures, and compositions of matter — to confine the meaning of “process” to a machine or transformation, under the doctrine of noscitur a sociis. - Under this canon, “an ambiguous term may be given more precise content by the neighboring words with which it is associated.” United States v. Stevens, 559 U. S. 460, 474 (2010) (internal quotation marks omitted). This canon is inapplicable here, for § 100(b) already explicitly defines the term “process.” See Burgess v. United States, 553 U. S. 124, 130 (2008) (“When a statute includes an explicit definition, we must follow that definition” (internal quotation marks omitted)). The Court of Appeals incorrectly concluded that this Court has endorsed the'machine-or-transformation test as the exclusive test. It is true that Cochrane v. Deener, 94 U. S. 780, 788 (1877), explained that a “process” is “an act, or a series of acts, performed upon the subject-matter to be transformed and reduced to a different state or thing.” More recent cases, however, have rejected the broad implications of this dictum; and, in all events, later authority shows that it was not intended to be an exhaustive or exclusive test. Gottschalk v. Benson, 409 U. S. 63, 70 (1972), noted that “[transformation and reduction of an article 'to a different state or thing’ is the clue to the patentability of a process claim that does not include particular machines.” At the same time, it explicitly declined to “hold that no process patent could ever qualify if it did not meet [machine-or-transformation] requirements.” Id., at 71. Flook took a similar approach, “assum[ing] that a valid process patent may issue even if it does not meet [the machine-or-transformation test].” 437 U. S., at 588, n. 9. This Court’s precedents establish that the machine-or-transformation test is a useful and important clue, an investigative tool, for determining whether some claimed inventions are processes under § 101. The machine-or-transformation test is not the sole test for deciding whether an invention is a patent-eligible “process.” 2 It is true that patents for inventions that did not satisfy the machine-or-transformation test were rarely granted in earlier eras, especially in the Industrial Age, as explained by Judge Dyk’s thoughtful historical review. See 545 F. 3d, at 966-976 (concurring opinion). But times change. Technology and other innovations progress in unexpected ways. For example, it was once forcefully argued that until recent times, “well-established principles of patent law probably would have prevented the issuance of a valid patent on almost any conceivable computer program.” Diehr, 450 U. S., at 195 (Stevens, J., dissenting). But this fact does not mean that unforeseen innovations such as computer programs are always unpatentable. See id., at 192-193 (majority opinion) (holding a procedure for molding rubber that included a computer program is within patentable subject matter). Section 101 is a “dynamic provision designed to encompass new and unforeseen inventions.” J. E. M. Ag Supply, Inc. v. Pioneer Hi-Bred Int'l, Inc., 534 U. S. 124, 135 (2001). A categorical rule denying patent protection for “inventions in areas not contemplated by Congress . . . would frustrate the purposes of the patent law.” Chakrabarty, 447 U. S., at 315. The machine-or-transformation test may well provide a sufficient basis for evaluating processes similar to those in the Industrial Age — for example, inventions grounded in a physical or other tangible form. But there are reasons to doubt whether the test should be the sole criterion for determining the patentability of inventions in the Information Age. As numerous amicus briefs argue, the machine-or-transformation test would create uncertainty as to the patentability of software, advanced diagnostic medicine techniques, and inventions based on linear programming, data compression, and the manipulation of digital signals. See, e. g., Brief for Business Software Alliance 24-25; Brief for Biotechnology Industry Organization et al. 14-27; Brief for Boston Patent Law Association 8-15; Brief for Houston Intellectual Property Law Association 17-22; Brief for Dolby Laboratories, Inc., et al. 9-10. In the course of applying the machine-or-transformation test to emerging technologies, courts may pose questions of such intricacy and refinement that they risk obscuring the larger object of securing patents for valuable inventions without transgressing the public domain. The dissent by Judge Rader refers to some of these difficulties. 545 F. 3d, at 1015. As a result, in deciding whether previously unforeseen inventions qualify as patentable “process[es],” it may not make sense to require courts to confine themselves to asking the questions posed by the machine-or-transformation test. Section 101’s terms suggest that new technologies may call for new inquiries. See Benson, supra, at 71 (to “freeze process patents to old technologies, leaving no room for the revelations of the new, onrushing technology [,]... is not our purpose”). It is important to emphasize that the Court today is not commenting on the patentability of any particular invention, let alone holding that any of the above-mentioned technologies from the Information Age should or should not receive patent protection. This Age puts the possibility of innovation in the hands of more people and raises new difficulties for the patent law. With ever more people trying to innovate and thus seeking patent protections for their inventions, the patent law faces a great challenge in striking the balance between protecting inventors and not granting monopolies over procedures that others would discover by independent, creative application of general principles. Nothing in this opinion should be read to take a position on where that balance ought to be struck. C 1 Section 101 similarly precludes the broad contention that the term “process” categorically excludes business methods. The term “method,” which is within § 100(b)’s definition of “process,” at least as a textual matter and before consulting other limitations in the Patent Act and this Court’s precedents, may include at least some methods of doing business. See, e. g., Webster’s New International Dictionary 1548 (2d ed. 1954) (defining “method” as “[a]n orderly procedure or process ... regular way or manner of doing anything; hence, a set form of procedure adopted in investigation or instruction”). The Court is unaware of any argument that the “ 'ordinary, contemporary, common meaning,’ ” Diehr, supra, at 182, of “method” excludes business methods. Nor is it clear how far a prohibition on business method patents would reach, and whether it would exclude technologies for conducting a business more efficiently. See, e. g., Hall, Business and Financial Method Patents, Innovation, and Policy, 56 Scottish J. Pol. Econ. 443, 445 (2009) (“There is no precise definition of . . . business method patents”). The argument that business methods are categorically outside of §101’s scope is further undermined by the fact that federal law explicitly contemplates the existence of at least some business method patents. Under 35 U. S. C. § 273(b)(1), if a patent holder claims infringement based on “a method in [a] patent,” the alleged infringer can assert a defense of prior use. For purposes of this defense alone, “method” is defined as “a method of doing or conducting business.” § 273(a)(3). In other words, by allowing this defense the statute itself acknowledges that there may be business method patents. Section 273’s definition of “method,” to be sure, cannot change the meaning of a prior-enacted statute. But what §273 does is clarify the understanding that a business method is simply one kind of “method” that is, at least in some circumstances, eligible for patenting under § 101. A conclusion that business methods are not patentable in any circumstances would render §273 meaningless. This would violate the canon against interpreting any statutory provision in a manner that would render another provision superfluous. See Corley v. United States, 556 U. S. 303, 314 (2009). This principle, of course, applies to interpreting any two provisions in the U. S. Code, even when Congress enacted the provisions at different times. See, e. g., Hague v. Committee for Industrial Organization, 307 U. S. 496, 529-530 (1939) (opinion of Stone, J.). This established rule of statutory interpretation cannot be overcome by judicial speculation as to the subjective intent of various legislators in enacting the subsequent provision. Finally, while §273 appears to leave open the possibility of some business method patents, it does not suggest broad patentability of such claimed inventions. 2 Interpreting § 101 to exclude all business methods simply because business method patents were rarely issued until modern times revives many of the previously discussed difficulties. See supra, at, 605-606. At the same time, some business method patents raise special problems in terms of vagueness and suspect validity. See eBay Inc. v. MercExchange, L. L. C., 547 U. S. 388, 397 (2006) (Kennedy, J., concurring). The Information Age empowers people with new capacities to perform statistical analyses and mathematical calculations with a speed and sophistication that enable the design of protocols for more efficient performance of a vast number of business tasks. If a high enough bar is not set when considering patent applications of this sort, patent examiners and courts could be flooded with claims that would put a chill on creative endeavor and dynamic change. In searching for a limiting principle, this Court’s precedents on the unpatentability of abstract ideas provide useful tools. See infra, at 609-612. Indeed, if the Court of Appeals were to succeed in defining a narrower category or class of patent applications that claim to instruct how business should be conducted, and then rule that the category is unpatentable because, for instance, it represents an attempt to patent abstract ideas, this conclusion might well be in accord with controlling precedent. See ibid. But beyond this or some other limitation consistent with the statutory text, the Patent Act leaves open the possibility that there are at least some processes that can be fairly described as business methods that are within patentable subject matter under §101. Finally, even if a particular business method fits into the statutory definition of a “process,” that does not mean that the application claiming that method should be granted. In order to receive patent protection, any claimed invention must be novel, § 102, nonobvious, § 103, and fully and particularly described, § 112. These limitations serve a critical role in adjusting the tension, ever present in patent law, between stimulating innovation by protecting inventors and impeding progress by granting patents when not justified by the statutory design. Ill Even though petitioners’ application is not categorically outside of § 101 under the two broad and atextual approaches the Court rejects today, that does not mean it is a “process” under § 101. Petitioners seek to patent both the concept of hedging risk and the application of that concept to energy markets. App. 19-20. Rather than adopting categorical rules that might have wide-ranging and unforeseen impacts, the Court resolves this case narrowly on the basis of this Court’s decisions in Benson, Flook, and Diehr, which show that petitioners’ claims are not patentable processes because they are attempts to patent abstract ideas. Indeed, all Members of the Court agree that the patent application at issue here falls outside of §101 because it claims an abstract idea. In Benson, the Court considered whether a patent application for an algorithm to convert binary-coded decimal numerals into pure binary code was a “process” under § 101. 409 U. S., at 64-67. The Court first explained that “‘[a] principie, in the abstract, is a fundamental truth; an original cause; a motive; these cannot be patented, as no one can claim in either of them an exclusive right.’” Id., at 67 (quoting Le Roy, 14 How., at 175). The Court then held the application at issue was not a “process,” but an unpatentable abstract idea. “It is conceded that one may not patent an idea. But in practical effect that would be the result if the formula for converting . . . numerals to pure binary numerals were patented in this case.” 409 U. S., at 71. A contrary holding “would wholly pre-empt the mathematical formula and in practical effect would be a patent on the algorithm itself.” Id., at 72.' In Flook, the Court considered the next logical step after Benson. The applicant there attempted to patent a procedure for monitoring the conditions during the catalytic conversion process in the petrochemical and oil-refining industries. The application’s only innovation was reliance on a mathematical algorithm. 437 U. S., at 585-586. Flook held the invention was not a patentable “process.” The Court conceded the invention at issue, unlike the algorithm in Benson, had been limited so that it could still be freely used outside the petrochemical and oil-refining industries. 437 U. S., at 589-590. Nevertheless, Flook rejected “[t]he notion that post-solution activity, no matter how conventional or obvious in itself, can transform an unpatentable principle into a patentable process.” Id., at 590. The Court concluded that the process at issue there was “unpatentable under § 101, not because it contained] a mathematical algorithm as one component, but because once that algorithm [wa]s assumed to be within the prior art, the application, considered as a whole, contained] no patentable invention.” Id., at 594. As the Court later explained, Flook stands for the proposition that the prohibition against patenting abstract ideas “cannot be circumvented by attempting to limit the use of the formula to a particular technological environment” or adding “insignificant postsolution activity.” Diehr, 450 U. S., at 191-192. Finally, in Diehr, the Court established a limitation on the principles articulated in Benson and Flook. The application in Diehr claimed a previously unknown method for “molding raw, uncured synthetic rubber into cured precision products,” using a mathematical formula to complete some of its several steps by way of a computer. 450 U. S., at 177. Diehr explained that while an abstract idea, law of nature, or mathematical formula could not be patented, “an application of a law of nature or mathematical formula to a known structure or process may well be deserving of patent protection.” Id., at 187. Diehr emphasized the need to consider the invention as a whole, rather than “dissecting] the claims into old and new elements and then . . . ignoring] the presence of the old elements in the analysis.” Id., at 188. Finally, the Court concluded that because the claim was not “an attempt to patent a mathematical formula, but rather [was] an industrial process for the molding of rubber products,” it fell within § 101’s patentable subject matter. Id., at 192-193. In light of these precedents, it is clear that petitioners’ application is not a patentable “process.” Claims 1 and 4 in petitioners’ application explain the basic concept of hedging, or protecting against risk: “Hedging is a fundamental economic practice long prevalent in our system of commerce and taught in any introductory finance class.” 545 F. 3d, at 1013 (Rader, J., dissenting); see, e. g., D. Chorafas, Introduction to Derivative Financial Instruments 75-94 (2008); C. Stickney, R. Weil, K. Schipper, & J. Francis, Financial Accounting: An Introduction to Concepts, Methods, and Uses 581-582 (13th ed. 2010); S. Ross, R. Westerfield, & B. Jordan, Fundamentals of Corporate Finance 743-744 (8th ed. 2008). The concept of hedging, described in claim 1 and reduced to a mathematical formula in claim 4, is an unpatentable abstract idea, just like the algorithms at issue in Benson and Flook. Allowing petitioners to patent risk hedging would pre-empt use of this approach in all fields, and would effectively grant a monopoly over an abstract idea. Petitioners’ remaining claims are broad examples of how hedging can be used in commodities and energy markets. Flook established that limiting an abstract idea to one field of use or adding token postsolution components did not make the concept patentable. That is exactly what the remaining claims in petitioners’ application do. These claims attempt to patent the use of the abstract idea of hedging risk in the energy market and then instruct the use of well-known random analysis techniques to help establish some of the inputs into the equation. Indeed, these claims add even less to the underlying abstract principle than the invention in Flook did, for the Flook invention was at least directed to the narrower domain of signaling dangers in operating a catalytic converter. * * * Today, the Court once again declines to impose limitations on the Patent Act that are inconsistent with the Act’s text. The patent application here can be rejected under our precedents on the unpatentability of abstract ideas. The Court, therefore, need not define further what constitutes a patentable “process,” beyond pointing to the definition of that term provided in § 100(b) and looking to the guideposts in Benson, Flook, and Diehr. And nothing in today’s opinion should be read as endorsing interpretations of §101 that the Court of Appeals for the Federal Circuit has used in the past. See, e. g., State Street, 149 F. 3d, at 1373; AT&T Corp., 172 F. 3d, at 1357. It may be that the Court of Appeals thought it needed to make the machine-or-transformation test exclusive precisely because its case law had not adequately identified less extreme means of restricting business method patents, including (but not limited to) application of our opinions in Benson, Flook, and Diehr. In disapproving an exclusive machine- or-transformation test, we by no means foreclose the Federal Circuit’s development of other limiting criteria that further the purposes of the Patent Act and are not inconsistent with its text. The judgment of the Court of Appeals is affirmed. It is so ordered. Justice Scalia does not join Parts II-B-2 and II-C-2.
Justice Stevens, with whom Justice Ginsburg, Justice Breyer, and Justice Sotomayor join, concurring in the judgment. In the area of patents, it is especially important that the law remain stable and clear. The only question presented in this case is whether the so-called machine-or-transformation test is the exclusive test for what constitutes a patentable “process” under 35 U. S. C. § 101. It would be possible to answer that question simply by holding, as the entire Court agrees, that although the machine-or-transformation test is reliable in most cases, it is not the exclusive test. I agree with the Court that, in light of the uncertainty that currently pervades this field, it is prudent to provide further guidance. But I would take a different approach. Rather than making any broad statements about how to define the term “process” in § 101 or tinkering with the bounds of the category of unpatentable, abstract ideas, I would restore patent law to its historical and constitutional moorings. For centuries, it was considered well established that a series of steps for conducting business was not, in itself, patentable. In the late 1990’s, the Federal Circuit and others called this proposition into question. Congress quickly responded to a Federal Circuit decision with a stopgap measure designed to limit a potentially significant new problem for the business community. It passed the First Inventor Defense Act of 1999 (1999 Act), 113 Stat. 1501A-555 (codified at 35 U. S. C. § 273), which provides a limited defense to claims of patent infringement, see § 273(b), for “method[s] of doing or conducting business,” § 273(a)(3). Following several more years of confusion, the Federal Circuit changed course, overruling recent decisions and holding that a series of steps may constitute a patentable process only if it is tied to a machine or transforms an article into a different state or thing. This “machine-or-transformation test” excluded general methods of doing business as well as, potentially, a variety of other subjects that could be called processes. The Court correctly holds that the machine-or-transformation test is not the sole test for what constitutes a patentable process; rather, it is a critical clue. But the Court is quite wrong, in my view, to suggest that any series of steps that is not itself an abstract idea or law of nature may constitute a “process” within the meaning of § 101. The language in the Court’s opinion to this effect can only cause mischief. The wiser course would have been to hold that petitioners’ method is not a “process” because it describes only a general method of engaging in business transactions— and business methods are not patentable. More precisely, although a process is not patent ineligible simply because it is useful for conducting business, a claim that merely describes a method of doing business does not qualify as a “process” under § 101. I Although the Court provides a brief statement of facts, ante, at 597-601, a more complete explication may be useful for those unfamiliar with petitioners’ patent application and this case’s procedural history. Petitioners’ patent application describes a series of steps for managing risk amongst buyers and sellers of commodities. The general method, described in claim 1, entails “managing the consumption risk costs of a commodity sold by a commodity provider at a fixed price,” and consists of the following steps: “(a) initiating a series of transactions between said commodity provider and consumers of said commodity wherein said consumers purchase said commodity at a fixed rate based upon historical averages, said fixed rate corresponding to a risk position of said consumers; “(b) identifying market participants for said commodity having a counter-risk position to said consumers; and “(c) initiating a series of transactions between said commodity provider and said market participants at a second fixed rate such that said series of market participant transactions balances the risk position of said series of consumer transactions.” App. 19-20. Although the patent application makes clear that the “method can be used for any commodity to manage consumption risk in a fixed bill price product,” id., at 11, it includes specific applications of the method, particularly in the field of energy, as a means of enabling suppliers and consumers to minimize the risks resulting from fluctuations in demand during specified time periods, see id., at 20-22. Energy suppliers and consumers may use that method to hedge their risks by agreeing upon a fixed series of payments at regular intervals throughout the year instead of charging or paying prices that fluctuate in response to changing weather conditions. The patent application describes a series of steps, including the evaluation of historical costs and weather variables and the use of economic and statistical formulas, to analyze these data and to estimate the likelihood of certain outcomes. See id., at 12-19. The patent examiner rejected petitioners’ application on the ground that it “is not directed to the technological arts,” insofar as it “is not implemented on a specific apparatus and merely manipulates [an] abstract idea and solves a purely mathematical problem without any limitation to a practical application.” App. to Pet. for Cert. 148a. The Board of Patent Appeals and Interferences affirmed the examiner’s decision, but it rejected the position that a patentable process must relate to “technological arts” or be performed on a machine. Id., at 180a-181a. Instead, the Board denied petitioners’ patent on two alternative, although similar, grounds: first, that the patent involves only mental steps that do not transform physical subject matter, id., at 181a-184a; and, second, that it is directed to an “abstract idea,” id., at 184a-187a. Petitioners appealed to the United States Court of Appeals for the Federal Circuit. After briefing and argument before a three-judge panel, the court sua sponte decided to hear the case en banc and ordered the parties to address: (1) whether petitioners’ “claim 1 . . . claims patent-eligible subject matter under 35 U. S. C. § 101”; (2) “fwjhat standard should govern in determining whether a process is patent-eligible subject matter”; (3) “[wjhether the claimed subject matter is not patent-eligible because it constitutes an abstract idea or mental process”; (4) “[wjhether a method or process must result in a physical transformation of an article or be tied to a machine to be patent-eligible subject matter”; and (5) whether the court’s decisions in State Street Bank & Trust Co. v. Signature Financial Group, Inc., 149 F. 3d 1368 (1998) (State Street), and AT&T Corp. v. Excel Communications, Inc., 172 F. 3d 1352 (1999), should be overruled in any respect. App. to Pet. for Cert. 144a-145a. The en banc Court of Appeals affirmed the Board’s decision. Eleven of the twelve judges agreed that petitioners’ claims do not describe a patentable “process,” § 101. Chief Judge Michel’s opinion, joined by eight other judges, rejected several possible tests for what is a patent-eligible process, including whether the patent produces a “ ‘useful, concrete and tangible result,’” whether the process relates to “technological arts,” and “categorical exclusions” for certain processes such as business methods. In re Bilski, 545 F. 3d 943, 959-960 (2008). Relying on several of our cases in which we explained how to differentiate a claim on a “fundamental principle” from a claim on a “process,” the court concluded that a “claimed process is surely patent-eligible under § 101 if: (1) it is tied to a particular machine or apparatus, or (2) it transforms a particular article into a different state or thing.” Id., at 954-955. The court further concluded that this “machine-or-transformation test” is “the sole test governing §101 analyses,” id., at 955 (emphasis added), and therefore the “test for determining patent eligibility of a process under §101,” id., at 956. Applying that test, the court held that petitioners’ claim is not a patent-eligible process. Id., at 963-966. In a separate opinion reaching the same conclusion, Judge Dyk carefully reviewed the history of American patent law and English precedents upon which our law is based, and found that “the unpatentability of processes not involving manufactures, machines, or compositions of matter has been firmly embedded . . . since the time of the Patent Act of 1793.” Id., at 966. Judge Dyk observed, moreover, that “[t]here is no suggestion in any of this early consideration of process patents that processes for organizing human activity were or ever had been patentable.” Id., at 972. Three judges wrote dissenting opinions, although two of those judges agreed that petitioners’ claim is not patent eligible. Judge Mayer would have held that petitioners’ claim “is not eligible for patent protection because it is directed to a method of conducting business.” Id., at 998. He submitted that “[t]he patent system is intended to protect and promote advances in science and technology, not ideas about how to structure commercial transactions.” Ibid. “Affording patent protection to business methods lacks constitutional and statutory support, serves to hinder rather than promote innovation!,] and usurps that which rightfully belongs in the public domain.” Ibid. Judge Rader would have rejected petitioners’ claim on the ground that it seeks to patent merely an abstract idea. Id., at 1011. Only Judge Newman disagreed with the court’s conclusion that petitioners’ claim seeks a patent on ineligible subject matter. Judge Newman urged that the en banc court’s machine-or-transformation test ignores the text and history of § 101, id., at 977-978, 985-990, is in tension with several decisions by this Court, id., at 978-985, and the Federal Circuit, id., at 990-992, and will invalidate thousands of patents that were issued in reliance on those decisions, id., at 992-994 Before explaining in more detail how I would decide this case, I will comment briefly on the Court’s opinion. The opinion is less than pellucid in more than one respect, and, if misunderstood, could result in confusion or upset settled areas of the law. Three preliminary observations may be clarifying. First, the Court suggests that the terms in the Patent Act must be read as lay speakers use those terms, and not as they have traditionally been understood in the context of patent law. See, e. g., ante, at 603 (terms in § 101 must be viewed in light of their “‘ordinary, contemporary, common meaning’ ”); ante, at 607 (patentable “method” is any “orderly procedure or process,” “regular way or manner of doing anything,” or “set form of procedure adopted in investigation or instruction” (internal quotation marks omitted)). As I will explain at more length in Part III, infra, if this portion of the Court’s opinion were taken literally, the results would be absurd: Anything that constitutes a series of steps would be patentable so long as it is novel, nonobvious, and described with specificity. But the opinion cannot be taken literally on this point. The Court makes this clear when it accepts that the “atextual” machine-or-transformation test, ante, at 609, is “useful and important,” ante, at 604, even though it “violates” the stated “statutory interpretation principles,” ante, at 603; and when the Court excludes processes that tend to pre-empt commonly used ideas, see ante, at 610-611. Second, in the process of addressing the sole issue presented to us, the opinion uses some language that seems inconsistent with our centuries-old reliance on the machine- or-transformation criteria as clues to patentability. Most notably, the opinion for a plurality suggests that these criteria may operate differently when addressing technologies of a recent vintage. See ante, at 605 (machine-or-transformation test is useful “for evaluating processes similar to those in the Industrial Age,” but is less useful “for determining the patentability of inventions in the Information Age”). In moments of caution, however, the opinion for the Court explains — correctly—that the Court is merely restoring the law to its historical state of rest. See ante, at 604 (“This Court’s precedents establish that the machine-or-transformation test is a useful and important clue, an investigative tool, for determining whether some claimed inventions are processes under §101”). Notwithstanding this internal tension, I understand the Court’s opinion to hold only that the machine-or-transformation test remains an important test for patentability. Few, if any, processes cannot effectively be evaluated using these criteria. Third, in its discussion of an issue not contained in the questions presented — whether the particular series of steps in petitioners’ application is an abstract idea — the Court uses language that could suggest a shift in our approach to that issue. Although I happen to agree that petitioners seek to patent an abstract idea, the Court does not show how this conclusion follows “clearfly],” ante, at 611, from our case law. The patent now before us is not for “[a] principle, in the abstract,” or a “fundamental truth.” Parker v. Flook, 437 U. S. 584, 589 (1978) (internal quotation marks omitted). Nor does it claim the sort of phenomenon of nature or abstract idea that was embodied by the mathematical formula at issue in Gottschalk v. Benson, 409 U. S. 63, 67 (1972), and in Flook. The Court construes petitioners’ claims on processes for pricing as claims on “the basic concept of hedging, or protecting against risk,” ante, at 611, and thus discounts the application’s discussion of what sorts of data to use, and how to analyze those data, as mere “token postsolution components,” ante, at 612. In other words, the Court artificially limits petitioners’ claims to hedging, and then concludes that hedging is an abstract idea rather than a term that describes a category of processes including petitioners’ claims. Why the Court does this is never made clear. One might think that the Court’s analysis means that any process that utilizes an abstract idea is itself an unpatentable, abstract idea. But we have never suggested any such rule, which would undermine a host of patentable processes. It is true, as the Court observes, that petitioners’ application is phrased broadly. See ante, at 611-612. But claim specification is covered by § 112, not § 101; and if a series of steps constituted an unpatentable idea merely because it was described without sufficient specificity, the Court could be calling into question some of our own prior decisions. At points, the opinion suggests that novelty is the clue. See ante, at 610-611. But the fact that hedging is “ ‘long prevalent in our system of commerce,’” ante, at 611, cannot justify the Court’s conclusion, as “the proper construction of §101 . . . does not involve the familiar issu[e] of novelty” that arises under § 102, Flook, 437 U. S., at 588. At other points, the opinion for a plurality suggests that the analysis turns on the category of patent involved. See, e. g., ante, at 608 (courts should use the abstract-idea rule as a “too[l]” to set “a high enough bar” “when considering patent applications of this sort”). But we have never in the past suggested that the inquiry varies by subject matter. The Court, in sum, never provides a satisfying account of what constitutes an unpatentable abstract idea. Indeed, the Court does not even explain if it is using the maehine-ortransformation criteria. The Court essentially asserts its conclusion that petitioners’ application claims an abstract idea. This mode of analysis (or lack thereof) may have led to the correct outcome in this case, but it also means that the Court’s musings on this issue stand for very little. Ill I agree with the Court that the text of § 101 must be the starting point of our analysis. As I shall explain, however, the text must not be the end point as well. Pursuant to its power “[t]o promote the Progress of . . . useful Arts, by securing for limited Times to . . . Inventors the exclusive Right to their . . . Discoveries,” U. S. Const., Art. I, § 8, cl. 8, Congress has passed a series of patent laws that grant certain exclusive rights over certain inventions and discoveries as a means of encouraging innovation. In the latest iteration, the Patent Act of 1952 (1952 Act), Congress has provided that “[w]hoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title,” 35 U. S. C. § 101, which include that the patent also be novel, § 102, and nonobvious, § 103. The statute thus authorizes four categories of subject matter that may be patented: processes, machines, manufactures, and compositions of matter. Section 101 imposes a threshold condition. “[N]o patent is available for a discovery, however useful, novel, and nonobvious, unless it falls within one of the express categories of patentable subject matter.” Kewanee Oil Co. v. Bicron Corp., 416 U. S. 470, 483 (1974). Section 101 undoubtedly defines in “expansive terms” the subject matter eligible for patent protection, as the statute was meant to ensure that “ ‘ingenuities] receive a liberal encouragement.’” Diamond v. Chakrabarty, 447 U. S. 303, 308-309 (1980); see also J. E. M. Ag Supply, Inc. v. Pioneer Hi-Bred Int’l, Inc., 534 U. S. 124, 130 (2001). Nonetheless, not every new invention or discovery may be patented. Certain things are “free for all to use.” Bonito Boats, Inc. v. Thunder Craft Boats, Inc., 489 U. S. 141, 151 (1989). The text of the Patent Act does not on its face give much guidance about what constitutes a patentable process. The statute defines the term “process” as a “process, art or method [that] includes a new use of a known process, machine, manufacture, composition of matter, or material.” § 100(b). But, this definition is not especially helpful, given that it also uses the term “process” and is therefore somewhat circular. As lay speakers use the word “process,” it constitutes any series of steps. But it has always been clear that, as used in § 101, the term does not refer to a “ ‘process’ in the ordinary sense of the word,” Flook, 437 U. S., at 588; see also Corning v. Burden, 15 How. 252, 268 (1854) (“[T]he term process is often used in a more vague sense, in which it cannot be the subject of a patent”). Rather, as discussed in some detail in Part IV, infra, the term “process” (along with the definitions given to that term) has long accumulated a distinctive meaning in patent law. When the term was used in the 1952 Act, it was neither intended nor understood to encompass any series of steps or any way to do any thing. With that understanding in mind, the Government has argued that because “a word” in a statute “is given more precise content by the neighboring words with which it” associates, United States v. Williams, 553 U. S. 285, 294 (2008), we may draw inferences from the fact that “[t]he other three statutory categories of patent-eligible subject matter identified in Section 101 — ‘machine, manufacture, or composition of matter’ — all ‘are things made by man, and involve technology.’” Brief for Respondent 26. Specifically, the Government submits, we may infer “that the term ‘process’ is limited to technological and industrial methods.” Ibid. The Court rejects this submission categorically, on the ground that “§ 100(b) already explicitly defines the term ‘process.’ ” Ante, at 604. But § 100(b) defines the term “process” by using the term “process,” as well as several other general terms. This is not a case, then, in which we must either “follow” a definition, ibid., or rely on neighboring words to understand the scope of an ambiguous term. The definition itself contains the very ambiguous term that we must define. In my view, the answer lies in between the Government’s and the Court’s positions: The terms adjacent to “process” in § 101 provide a clue as to its meaning, although not a very strong clue. Section 101’s list of categories of patentable subject matter is phrased in the disjunctive, suggesting that the term “process” has content distinct from the other items in the list. It would therefore be illogical to “rob” the word “process” of all independent meaning. Reiter v. Sonotone Corp., 442 U. S. 330, 338 (1979). Moreover, to the extent we can draw inferences about what is a “process” from common attributes in § 101, it is a dangerous endeavor to do so on the basis of a perceived overarching theme. Given the many moving parts at work in the Patent Act, there is a risk of merely confirming our preconceived notions of what should be patentable or of seeing common attributes that track “the familiar issues of novelty and obviousness” that arise under other sections of the statute but are not relevant to § 101, Flook, 437 U. S., at 588. The placement of “process” next to other items thus cannot prove that the term is limited to any particular categories; it does, however, give reason to be skeptical that the scope of a patentable “process” extends to cover any series of steps at all. The Court makes a more serious interpretive error. As briefly discussed in Part II, supra, the Court at points appears to reject the well-settled proposition that the term “process” in § 101 is not a “ ‘process’ in the ordinary sense of the word,” Flook, 437 U. S., at 588. Instead, the Court posits that the word “process” must be understood in light of its “ordinary, contemporary, common meaning,” ante, at 603 (internal quotation marks omitted). Although this is a fine approach to statutory interpretation in general, it is a deeply flawed approach to a statute that relies on complex terms of art developed against a particular historical background. Indeed, the approach would render § 101 almost comical. A process for training a dog, a series of dance steps, a method of shooting a basketball, maybe even words, stories, or songs if framed as the steps of typing letters or uttering sounds— all would be patent eligible. I am confident that the term “process” in § 101 is not nearly so capacious. So is the Court, perhaps. What is particularly incredible about the Court’s stated method of interpreting § 101 (other than that the method itself may be patent eligible under the Court’s theory of § 101) is that the Court deviates from its own professed commitment to “ordinary, contemporary, common meaning.” As noted earlier, the Court accepts a role for the “atextual” machine-or-transformation “clue.” Ante, at 609, 604. The Court also accepts that we have “foreclose[d] a purely literal reading of § 101,” Flook, 437 U. S., at 589, by holding that claims that are close to “laws of nature, natural phenomena, and abstract ideas,” Diamond v. Diehr, 450 U. S. 175, 185 (1981), do not count as “processes” under §101, even if they can be colloquially described as such. The Court attempts to justify this latter exception to § 101 as “a matter of statutory stare decisis.” Ante, at 602. But it is strange to think that the very same term must be interpreted literally on some occasions, and in light of its historical usage on others. In fact, the Court’s understanding of § 101 is even more remarkable because its willingness to exclude general principles from the provision’s reach is in tension with its apparent willingness to include steps for conducting business. The history of patent law contains strong norms against patenting these two categories of subject matter. Both norms were presumably incorporated by Congress into the 1952 Act. IV Because the text of § 101 does not on its face convey the scope of patentable processes, it is necessary, in my view, to review the history of our patent law in some detail. This approach yields a much more straightforward answer to this case than the Court’s. As I read the history, it strongly supports the conclusion that a method of doing business is not a “process” under § 101. I am, of course, mindful of the fact that § 101 “is a dynamic provision designed to encompass new and unforeseen inventions,” and that one must therefore view historical conceptions of patent-eligible subject matter at an appropriately high level of generality. J. E. M. Ag Supply, 534 U. S., at 135; see also Chakmbarty, 447 U. S., at 315-316. But it is nonetheless significant that while people have long innovated in fields of business, methods of doing business fall outside of the subject matter that has “historically been eligible to receive the protection of our patent laws,” Diehr, 450 U. S., at 184, and likely go beyond what the modern patent “statute was enacted to protect,” Flook, 437 U. S., at 593. It is also significant that when Congress enacted the 1952 Act, it did so against the background of a well-settled understanding that a series of steps for conducting business cannot be patented. These considerations ought to guide our analysis. As Justice Holmes noted long ago, sometimes, “a page of history is worth a volume of logic.” New York Trust Co. v. Eisner, 256 U. S. 345, 349 (1921). English Backdrop The Constitution’s Patent Clause was written against the “backdrop” of English patent practices, Graham v. John Deere Co. of Kansas City, 383 U. S. 1, 5 (1966), and early American patent law was “largely based on and incorporated” features of the English patent system, E. Walterscheid, To Promote the Progress of Useful Arts: American Patent Law and Administration, 1798-1836, p. 109 (1998) (hereinafter Walterscheid, To Promote the Progress). The governing English law, the Statute of Monopolies, responded to abuses whereby the Crown would issue letters patent, “granting monopolies to court favorites in goods or businesses which had long before been enjoyed by the public.” Graham, 383 U. S., at 5. The statute generally prohibited the Crown from granting such exclusive rights, 21 Jam. 1, ch. 3, § 1 (1623), in 4 Statutes of the Realm 1213, but it contained exceptions that, inter alia, permitted grants of exclusive rights to the “working or makinge of any manner of new Manufactures,” §6. Pursuant to that provision, patents issued for the “mode, method, or way of manufacturing,” P. Campin, Law of Patents for Inventions 11 (1869) (emphasis deleted), and English courts construed the phrase “working or makinge of any manner of new Manufactures” to encompass manufacturing processes, see, e. g., Boulton v. Bull, 2 H. Bl. 463, 471, 492, 126 Eng. Rep. 651, 655, 666 (C. P. 1795) (holding that the term “manufacture” “applied not only to things made, but to the practice of making, to principles carried into practice in a new manner, to new results of principles carried into practice”). Thus, English courts upheld James Watt’s famous patent on a method for reducing the consumption of fuel in steam engines, as well as a variety of patents issued for methods of synthesizing substances or building mechanical devices. Although it is difficult to derive a precise understanding of what sorts of methods were patentable under English law, there is no basis in the text of the Statute of Monopolies, nor in pre-1790 English precedent, to infer that business methods could qualify. There was some debate throughout the relevant time period about what processes could be patented. But it does not appear that anyone seriously believed that one could patent “a method for organizing human activity.” 545 F. 3d, at 970 (Dyk, J., concurring). There were a small number of patents issued between 1623 and 1790 relating to banking or lotteries and one for a method of life insurance, but these did not constitute the “prevailing]” “principles and practice” in England on which our patent law was based, Pennock v. Dialogue, 2 Pet. 1, 18 (1829). Such patents were exceedingly rare, and some of them probably were viewed not as inventions or discoveries but rather as special state privileges that until the mid-1800’s were recorded alongside inventions in the patent records, see MacLeod 1-2 (explaining that various types of patents were listed together). It appears that the only English patent of the time that can fairly be described as a business method patent was one issued in 1778 on a “Plan for assurances on lives of persons from 10 to 80 years of Age.” Woodcroft 324. And “[t]here is no indication” that this patent “was ever enforced or its validity tested,” 545 F. 3d, at 974 (Dyk, J., concurring); the patent may thus have represented little more than the whim — or error — of a single patent clerk. In any event, these patents (or patent) were probably not known to the Framers of early patent law. In an era before computerized databases, organized ease law, and treatises, the American drafters probably would have known about particular patents only if they were well publicized or subject to reported litigation. So far as I am aware, no published cases pertained to patents on business methods. Also noteworthy is what was not patented under the English system. During the 17th and 18th centuries, Great Britain saw innovations in business organization, business models, management techniques, and novel solutions to the challenges of operating global firms in which subordinate managers could be reached only by a long sea voyage. New if any of these methods of conducting business were patented. Early American Patent Law At the Constitutional Convention, the Founders decided to give Congress a patent power so that it might “promote the Progress of . . . useful Arts.” Art. I, §8, cl. 8. There is little known history of that Clause. We do know that the Clause passed without objection or debate. This is striking because other proposed powers, such as a power to grant charters of incorporation, generated discussion about the fear that they might breed “monopolies.” Indeed, at the ratification conventions, some States recommended amendments that would have prohibited Congress from granting “ 'exclusive advantages of commerce.’ ” If the original understanding of the Patent Clause included the authority to patent methods of doing business, it might not have passed so quietly. In 1790, Congress passed the first Patent Act, an “Act to promote the progress of useful Arts” that authorized patents for persons who had “invented or discovered any useful art, manufacture, engine, machine, or device, or any improvement therein not before known or used,” if “the invention or discovery [was] sufficiently useful and important.” 1 Stat. 109-110. Three years later, Congress passed the Patent Act of 1793 and slightly modified the language to cover “any new and useful art, machine, manufacture or composition of matter, or any new and useful improvement on any art, machine, manufacture or composition of matter.” 1 Stat. 319. The object of the constitutional patent power and the statutory authorization for process patents in the early patent Acts was the term “useful art.” It is not evident from the face of the statutes or the Constitution whether the objects of the patent system wer