STEVENS, J., delivered the opinion of the Court in which BURGER, C.J., and BRENNAN, WHITE, and O'CONNOR, JJ., joined. BLACKMUN, J., flied a dissenting opinion in which MARSHALL, POWELL, and REHNQUIST, JJ., joined, post, p. 457.

JUSTICE STEVENS delivered the opinion of the Court.

1. Petitioners manufacture and sell home video tape recorders. Respondent's own the copyrights on some of the television programs that are broadcast on the public airwaves. Some members of the general public use video tape recorders sold by petitioners to record some of these broadcasts, as well as a large number of other broadcasts. The question presented is whether the sale of petitioners' copying equipment to the general public violates any of the rights conferred upon respondents by the Copyright Act.

2. Respondents commenced this copyright infringement action against petitioners in the United States District Court for the Central District of California in 1976. Respondents alleged that some individuals had used Betamax video tape recorders (VTR's) to record some of respondents' copyrighted works which had been exhibited on commercially sponsored television and contended that these individuals had thereby infringed respondents' copyrights. Respondents further maintained that petitioners were liable for the copyright infringement allegedly committed by Betamax consumers because of petitioners' marketing of the Betamax VTR's. Respondents sought no relief against any Betamax consumer. Instead, they sought money damages and an equitable accounting of profits from petitioners, as well as an injunction against the manufacture and marketing of Betamax VTR's.

3. After a lengthy trial, the District Court denied respondents all the relief they sought and entered judgment for petitioners. 480 F. Supp. 429 (1979). The United States Court of Appeals for the Ninth Circuit reversed the District Court's judgment on respondents' copyright claim, holding petitioners liable for contributory infringement and ordering the District Court to fashion appropriate relief. 659 F.2d 963 (1981). We granted certiorari, 457 U.S. 1116 (1982); since we had not completed our study of the case last Term, we ordered reargument, 463 U.S. 1226 (1983). We now reverse.

4. An explanation of our rejection of respondents' unprecedented attempt to impose copyright liability upon the distributors of copying equipment requires a quite detailed recitation of the findings of the District Court. In summary, those findings reveal that the average member of the public uses a VTR principally to record a program he cannot view as it is being televised and then to watch it once at a later time. This practice, known as "time-shifting," enlarges the television viewing audience. For that reason, a significant amount of television programming may be use din this manner without objection from the owners of the copyrights on the programs. For the same reason, even the two respondents in this case, who do assert objections to time-shifting in this litigation, were unable to prove that the practice has impaired the commercial value of their copyrights or has created any likelihood of future harm. Given these findings, there is no basis in the Copyright Act upon which respondents can hold petitioners liable for distributing VTR's to the general public. The Court of Appeals' holding that respondents are entitled to enjoin the distribution of VTR's, to collect royalties on the sale of such equipment, or to obtain other relief, if affirmed, would enlarge the scope of respondents' statutory monopolies to encompass control over an article of commerce that is not the subject of copyright protection. Such an expansion of the copyright privilege is beyond the limits of the grants authorized by Congress.

5. .....

III

6. The Copyright Act does not expressly render anyone liable for infringement committed by another. In contrast, the Patent Act expressly brands anyone who "actively induces infringement of a patent" as an infringer, 35 U.S.C. 271(b), and further imposes liability on certain individuals labeled "contributory" infringers, 271(c). The absence of such express language in the copyright statute does not preclude the imposition of liability for copyright infringements on certain parties who have not themselves engaged in the infringing activity. fn1   For vicarious liability is imposed in virtually all areas of the law, and the concept of contributory infringement is merely a species of the broader problem of identifying the circumstances in which it is just to hold one individual accountable for the actions of another.

7. Such circumstances were plainly present in Kalem Co. v. Harper Brothers, 222 U.S. 55 (1911), the copyright decision of this Court on which respondents place their principal reliance. In Kalem, the Court held that the producer of an unauthorized film dramatization of the copyrighted book Ben Hur was liable for his sale of the motion picture to jobbers, who in turn arranged for the commercial exhibition of the film. Justice Holmes, writing for the Court, explained:

8. "The defendant not only expected but invoked by advertisement the use of its films for dramatic reproduction of the story. That was the most conspicuous purpose for which they could be used, and the one for which especially they were made. If the defendant did not contribute to the infringement it is impossible to do so except by taking part in the final act. It is liable on principles recognized in every part of the law." Id., at 62-63.

9. The use for which the item sold in Kalem had been "especially" made was, of course, to display the performance that had already been recorded upon it. The producer had personally appropriated the copyright owner's protected work and, as the owner of the tangible medium of expression upon which the protected work was recorded, authorized that use by his sale of the film to jobbers. But that use of the film was not his to authorize: the copyright owner possessed the exclusive right to authorize public  performances of his work. Further, the producer personally advertised the unauthorized public performances, dispelling any possible doubt as to the use of the film which he had authorized.

10. Respondents argue that Kalem stands for the proposition that supplying the "means" to accomplish an infringing activity and encouraging that activity through advertisement are sufficient to establish liability for copyright infringement. This argument rests on a gross generalization that cannot withstand scrutiny. The producer in Kalem did not merely provide the " means"to accomplish an infringing activity; the producer supplied the work itself, albeit in a new medium of expression. Sony in the instant case does not supply Betamax consumers with respondents' works; respondents do. Sony supplies a piece of equipment that is generally capable of copying the entire range of programs that may be televised: those that are uncopyrighted, those that are copyrighted but may be copied without objection from the copyright holder, and those that the copyright holder would prefer not to have copied. The Betamax can be used to [464 U.S. 417, 437] make authorized or unauthorized uses of copyrighted works, but the range of its potential use is much broader than the particular infringing use of the film Ben Hur involved in Kalem. Kalem does not support respondents' novel theory of liability.

11. Justice Holmes stated that the producer had "contributed" to the infringement of the copyright, and the label "contributory infringement "has been applied in a number of lower court copyright cases involving an ongoing relationship between the direct infringer and the contributory infringer at the time the infringing conduct occurred. In such cases, as in other situations in which the imposition of vicarious liability is manifestly just, the "contributory" infringer was in a position to control the use of copyrighted works by others and had authorized the use without permission from the copyright owner. fn2  This case, however, plainly does not fall in that category. The only contact between Sony and the users of the Betamax that is disclosed by this record occurred at the moment of sale. The District Court expressly found that "no employee of Sony, Sonam or DDBI had either direct involvement with the allegedly infringing activity or direct contact with purchasers of Betamax who recorded copyrighted works off-the-air." 480 F. Supp., at 460. And it further found that "there was no evidence that any of the copies made by Griffiths orthe other individual witnesses in this suit were influenced or encouraged by [Sony's] advertisements." Ibid.

12. If vicarious liability is to be imposed on Sony in this case, it must rest on the fact that it has sold equipment with constructive knowledge of the fact that its customers may use that equipment to make unauthorized copies of copyrighted material. There is no precedent in the law of copyright for the imposition of vicarious liability on such a theory. The closest analogy is provided by the patent law cases to which it is appropriate to refer because of the historic kinship between patent law and copyright law.

13. In the Patent Act both the concept of infringement and the concept of contributory infringement are expressly defined by statute. The prohibition against contributory infringement is confined to the knowing sale of a component especially made for use in connection with a particular patent. There is no suggestion in the statute that one patentee may object to the sale of a product that might be used in connection with other patents. Moreover, the Act expressly provides that the sale of a "staple article or commodity of commerce suitable for substantial noninfringing use" is not contributory infringement. 35 U.S.C. 271(c).

14. When a charge of contributory infringement is predicated entirely on the sale of an article of commerce that is used by the purchaser to nfringe a patent, the public interest in access to that article of commerce is necessarily implicated. A finding of contributory infringement does not, of course, remove the article from the market altogether; it does, however, give the patentee effective control over the sale of that item.  Indeed, a finding of contributory infringement is normally the functional equivalent of holding that the disputed article is within the monopoly granted to the patentee. fn3

15. For that reason, in contributory infringement cases arising under the patent laws the Court has always recognized the critical importance of not allowing the patentee to extend his monopoly beyond the limits of his specific grant. These cases deny the patentee any right to control the distribution of unpatented articles unless they are "unsuited for any commercial noninfringing use." Dawson Chemical Co. v. Rohm & Hass Co., 448 U.S. 176, 198 (1980). Unless a commodity "has no use except through practice of the patented method," id., at 199, the patentee has no right to claim that its distribution constitutes contributory infringement. "To form the basis for contributory infringement the item must almost be uniquely suited as a component of the patented invention." P. Rosenberg, Patent Law Fundamentals 17.022. (2d ed. 1982). "[A] sale of an article which though adapted to an infringing use is also adapted to other and lawful uses, is not enough to make the seller a contributory infringer. Such a rule would block the wheels of commerce." Henry v. A. B. Dick Co., 224 U.S. 1, 48 (1912), overruled on other grounds, Motion Picture Patents Co. v. Universal Film Mfg. Co., 243 U.S. 502, 517 (1917).

16. We recognize there are substantial differences between the patent and copyright laws. But in both areas the contributory infringement doctrine is grounded on the recognition that adequate protection of a monopoly may require the courts to look beyond actual duplication of a device or publication to the products or activities that make such duplication possible. The staple article of commerce doctrine must strike a balance between a copyright holder's legitimate demand for effective - not merely symbolic - protection of the statutory monopoly, and the rights of others freely to engage insubstantially unrelated areas of commerce. Accordingly, the sale of copying equipment, like the sale of other articles of commerce, does not constitute contributory infringement if the product is widely used for legitimate, unobjectionable purposes. Indeed, it need merely be capable of substantial noninfringing uses.

IV

17. The question is thus whether the Betamax is capable of commercially significant noninfringing uses. In order to resolve that question, we need not explore all the different potential uses of the machine and determine whether or not they would constitute infringement. Rather, we need only consider whether on the basis of the facts as found by the District Court a significant number of them would be noninfringing. Moreover, in order to resolve this case we need not give precise content to the question of how much use is commercially significant. For one potential use of the Betamax plainly satisfies this standard, however it is understood: private, noncommercial time-shifting in the home. It does so both (A) because respondents have no right to prevent other copyright holders from authorizing it for their programs, and (B) because the District Court's factual findings reveal that even the unauthorized home time-shifting of respondents' programs is legitimate fair use.

18. Authorized Time-Shifting

19. Each of the respondents owns a large inventory of valuable copyrights, but in the total spectrum of television programming their combined market share is small. The exact percentage is not specified, but it is well below 10%. If they were to prevail, the outcome of this litigation would have a significant impact on both the producers and the viewers of the remaining 90% of the programming in the Nation. No doubt, many other producers share respondents' concern about the possible consequences of unrestricted copying. Nevertheless the findings of the District Court make it clear that time-shifting may enlarge the total viewing audience and that many producers are willing to allow private time-shifting to continue, at least for an experimental time period.

20. The District Court found:

21. "Even if it were deemed that home-use recording of copyrighted material constituted infringement, the Betamax could still legally be used to record noncopyrighted material or material whose owners consented to the copying. An injunction would deprive the public of the ability to use the Betamax for this noninfringing off-the-air recording.

22. "Defendants introduced considerable testimony at trial about the potential for such copying of sports, religious, educational and other programming. This included testimony from representatives of the Offices of the Commissioners of the National Football, Basketball, Baseball and Hockey Leagues and Associations, the Executive Director of National Religious Broadcasters and various educational communications agencies. Plaintiffs attack the weight of the testimony offered and also contend that an injunction is warranted because infringing uses outweigh noninfringing uses.

23. "Whatever the future percentage of legal versus illegal home-use recording might be, an injunction which seeks to deprive the public of the very tool or article of commerce capable of some noninfringing use would be an extremely harsh remedy, as well as one unprecedented in copyright law." 480 F. Supp., at 468.

24. Although the District Court made these statements in the context of considering the propriety of injunctive relief, the statements constitute a finding that the evidence concerning "sports, religious, educational and other programming" was sufficient to establish a significant quantity of broadcasting whose copying is now authorized, and a significant potential for future authorized copying. That finding is amply supported by the record. In addition to the religious and sports officials identified explicitly by the District Court, two items in the record deserve specific mention.

25. First is the testimony of John Kenaston, the station manager of Channel 58, an educational station in Los Angeles affiliated with the Public Broadcasting Service. He explained and authenticated the station's published guide to its programs. For each program, the guide tells whether unlimited home taping is authorized, home taping is authorized subject to certain restrictions (such as erasure within seven days), or home taping is not authorized at all. The Spring 1978 edition of the guide described 107 programs. Sixty-two of those programs or 58% authorize some home taping. Twenty-one of them or almost 20% authorize unrestricted home taping.

26. Second is the testimony of Fred Rogers, president of the corporation that produces and owns the copyright on Mister Rogers' Neighborhood. The program is carried by more public television stations than any other program. Its audience numbers over 3,000,000 families a day. He testified that he had absolutely no objection to home taping for noncommercial use and expressed the opinion that it is a real service to families to be able to record children's programs and to show them at appropriate times.

27. If there are millions of owners of VTR's who make copies of televised sports events, religious broadcasts, and educational programs such as Mister Rogers' Neighborhood, and if the proprietors of those programs welcome the practice, the business of supplying the equipment that makes such copying feasible should not be stifled simply because the equipment is used by some individuals to make unauthorized reproductions of respondents' works. The respondents do not represent a class composed of all copyright holders. Yet a finding of contributory infringement would inevitably frustrate the interests of broadcasters in reaching the portion of their audience that is available only through time-shifting.

28. Of course, the fact that other copyright holders may welcome the practice of time-shifting does not mean that respondents should be deemed to have granted a license to copy their programs. Third-party conduct would be wholly irrelevant in an action for direct infringement of respondents' copyrights. But in an action for contributory infringement against the seller of copying equipment, the copyright holder may not prevail unless the relief that he seeks affects only his programs, or unless he speaks for virtually all copyright holders with an interest in the outcome. In this case, the record makes it perfectly clear that there are many important producers of national and local television programs who find nothing objectionable about the enlargement in the size of the television audience that results from the practice of time-shifting for private home use. fn4 The seller of the equipment that expands those producers' audiences cannot be a contributory infringer if, as is true in this case, it has had no direct involvement with any infringing activity.

29. Unauthorized Time-Shifting

30. Even unauthorized uses of a copyrighted work are not necessarily infringing. An unlicensed use of the copyright is not an infringement unless it conflicts with one of the specific exclusive rights conferred by the copyright statute. Twentieth Century Music Corp. v. Aiken, 422 U.S., at 154-155. Moreover, the definition of exclusive rights in 106 of the present Act is prefaced by the words "subject to sections 107 through 118." Those sections describe a variety of uses of copyrighted material that "are not infringements of copyright" "notwithstanding the provisions of section 106." The most pertinent in this case is 107, the legislative endorsement of the doctrine of "fair use."

31. That section identifies various factors fn5 that enable a court to apply an "equitable rule of reason" analysis to particular claims of infringement. Although not conclusive, the first factor requires that "the commercial or nonprofit character of an activity" be weighed in any fair use decision. fn6 If the Betamax were used to make copies for a commercial or profitmaking purpose, such use would presumptively be unfair. The contrary presumption is appropriate here, however, because the District Court's findings plainly establish that time-shifting for private home use must be characterized as a noncommercial, nonprofit activity. Moreover, when one considers the nature of a televised copyrighted audiovisual work, see 17 U.S.C. 107(2)(1982 ed.), and that time-shifting merely enables a viewer to see such a work which he had been invited to witness in its entirety free of charge, the fact that the entire work is reproduced, see 107(3), does not have its ordinary effect of militating against a finding of fair use. fn7

32. This is not, however, the end of the inquiry because Congress has also directed us to consider "the effect of the use upon the potential market for or value of the copyrighted work." 107(4). The purpose of copyright is to create incentives for creative effort. Even copying for noncommercial purposes may impair the copyright holder's ability to obtain the rewards that Congress intended him to have. But a use that has no demonstrable effect upon the potential market for, or the value of, the copyrighted work need not be prohibited in order to protect the author's incentive to create. The prohibition of such noncommercial uses would merely inhibit access to ideas without any countervailing benefit.

33. Thus, although every commercial use of copyrighted material is presumptively an unfair exploitation of the monopoly privilege that belongs to the owner of the copyright, noncommercial uses are a different matter. A challenge to a noncommercial use of a copyrighted work requires proof either that the particular use is harmful, or that if it should become widespread, it would adversely affect the potential market for the copyrighted work. Actual present harm need not be shown; such a requirement would leave the copyright holder with no defense against predictable damage. Nor is it necessary to show with certainty that future harm will result. Whatis necessary is a showing by a preponderance of the evidence that some meaningful likelihood of future harm exists. If the intended use is for commercial gain, that likelihood may be presumed. But if it is for a noncommercial purpose, the likelihood must be demonstrated.

34. In this case, respondents failed to carry their burden with regard to home time-shifting. The District Court described respondents' evidenceas follows:

35. "Plaintiffs' experts admitted at several points in the trial that the time-shifting without librarying would result in `not a great deal of harm.' Plaintiffs' greatest concern about time-shifting is with `a point of important philosophy that transcends even commercial judgment. 'They fear that with any Betamax usage, `invisible boundaries' are passed: `the copyright owner has lost control over his program.'" 480 F. Supp., at 467.

36. Later in its opinion, the District Court observed:

37. "Most of plaintiffs' predictions of harm hinge on speculation about audience viewing patterns and ratings, a measurement system which Sidney Sheinberg, MCA's president, calls a `black art' because of the significant level of imprecision involved in the calculations." Id., at 469.

38. There was no need for the District Court to say much about past harm. "Plaintiffs have admitted that no actual harm to their copyrights has occurred to date." Id., at 451.

39. On the question of potential future harm from time-shifting, the District Court offered a more detailed analysis of the evidence. It rejected respondents' "fear that persons `watching' the original telecast of a program will not be measured in the live audience and the ratings and revenues will decrease," by observing that current measurement technology allows the Betamax audience to be reflected. Id., at 466. It rejected respondents' prediction "that live television [464 U.S. 417, 453] or movie audiences will decrease as more people watch Betamax tapes as an alternative," with the observation that "[t]here is no factual basis for [the underlying] assumption." Ibid. fn8 It rejected respondents' "fear that time-shifting will reduce audiences for telecast reruns," and concluded instead that "given current market practices, this should aid plaintiffs rather than harm them." Ibid. fn9 And it declared that respondents' suggestion that "theater or film rental exhibition of a program will suffer because of time-shift recording of that program" "lacks merit." Id., at 467. fn10

40. After completing that review, the District Court restated its overall conclusion several times, in several different ways. "Harm from time-shifting is speculative and, at best, minimal." Ibid. "The audience benefits from the time-shifting capability have already been discussed. It is not implausible that benefits could also accrue to plaintiffs, broadcasters, and advertisers, as the Betamax makes it possible for more persons to view their broadcasts." Ibid. "No likelihood of harm was shown at trial, and plaintiffs admitted that there had been no actual harm to date." Id., at 468-469. "Testimony at trial suggested that Betamax may require adjustments in marketing strategy, but it did not establish even a likelihood of harm." Id., at 469. "Television production by plaintiffs today is more profitable than it has ever been, and, in five weeks of trial, there was no concrete evidence to suggest that the Betamax will change the studios' financial picture." Ibid.

41. The District Court's conclusions are buttressed by the fact that to the extent time-shifting expands public access to freely broadcast television programs, it yields societal benefits. In Community Television of Southern California v. Gottfried, 459 U.S. 498, 508, n. 12 (1983), we acknowledged the public interest in making television broadcasting more available. Concededly, that interest is not unlimited. But it supports an interpretation of the concept of "fair use" that requires the copyright holder to demonstrate some likelihood of harm before he may condemn a private act of time-shifting as a violation of federal law.

42. When these factors are all weighed in the "equitable rule of reason" balance, we must conclude that this record amply supports the District Court's conclusion that home time-shifting is fair use. In light of the findings of the District Court regarding the state of the empirical data, it is clear that the Court of Appeals erred in holding that the statute as presently written bars such conduct. fn11

43. In summary, the record and findings of the District Court lead us to two conclusions. First, Sony demonstrated a significant likelihood that substantial numbers of copyright holders who license their works for broadcast on free television would not object to having their broadcaststime-shifted by private viewers. And second, respondents failed to demonstrate that time-shifting would cause any likelihood of nonminimal harm to the potential market for, or the value of, their copyrighted works. The Betamax is, therefore, capable of substantial noninfringing uses. Sony's sale of such equipment to the general public does not constitute contributory infringement of respondents' copyrights.

 V

44. "The direction of Art. I is that Congress shall have the power to promote the progress of science and the useful arts. When, as here, the Constitution is permissive, the sign of how far Congress has chosen to go can come only from Congress." Despots Packing Co. v. Laitram Corp., 406 U.S. 518, 530 (1972).

45. One may search the Copyright Act in vain for any sign that the elected representatives of the millions of people who watch television every day have made it unlawful to copy a program for later viewing at home, or have enacted a flat prohibition against the sale of machines that make such copying possible.

46. It may well be that Congress will take a fresh look at this new technology, just as it so often has examined other innovations in the past. But it is not our job to apply laws that have not yet been written. Applying the copyright statute, as it now reads, to the facts as they have been developed in this case, the judgment of the Court of Appeals must be reversed.
It is so ordered.

Footnotes

1. As the District Court correctly observed, however, "the lines between direct infringement, contributory infringement and vicarious liability are not clearly drawn . . . ." 480 F. Supp., at 457-458. The lack of clarity in this area may, in part, be attributable to the fact that an infringer is not merely one who uses a work without authorization by the copyright owner, but also one who authorizes the use of a copyrighted work without actual authority from the copyright owner.

We note the parties' statements that the questions of Sony's liability under the "doctrines" of "direct infringement" and "vicarious liability "are not nominally before this Court. Compare Brief for Respondents 9, n.22, 41, n. 90, with Reply Brief for Petitioners 1, n. 2. We also observe, however, that reasoned analysis of respondents' unprecedented contributory infringement claim necessarily entails consideration of arguments and caselaw which may also be forwarded under the other labels, and indeed the parties to a large extent rely upon such arguments and authority in support of their respective positions on the issue of contributory infringement.

2. The  so-called "dance hall cases," Famous Music Corp. v. Bay State Harness Horse Racing & Breeding Assn., Inc., 554 F.2d 1213 (CA1 1977)(racetrack retained infringer to supply music to paying customers); KECAMusic, Inc. v. Dingus McGee's Co., 432 F. Supp. 72 (WD Mo. 1977) (cocktail lounge hired musicians to supply music to paying customers); Dreamland Ball Room, Inc. v. Shapiro, Bernstein & Co., 36 F.2d 354 (CA7 1929)(dance hall hired orchestra to supply music to paying customers), are often contrasted with the so-called landlord-tenant cases, in which landlords who leased premises to a direct infringer for a fixed rental and did not participate directly in any infringing activity were found not to be liablefor contributory infringement. E. g., Deutsch v. Arnold, 98 F.2d 686 (CA21938).

In Shapiro, Bernstein & Co. v. H. L. Green Co., 316 F.2d 304 (CA2 1963), the owner of 23 chainstores retained the direct infringer to run its record departments. The relationship was structured as a licensing arrangement, so that the defendant bore none of the business risk of running the department. Instead, it received 10% or 12% of the direct infringer'sgross receipts. The Court of Appeals concluded:
"[The dance-hall cases] and this one lie closer on the spectrum to the employer-employee model, than to the landlord-tenant model. . . . [O]nthe particular facts before us, . . . Green's relationship to its infringing licensee, as well as its strong concern for the financial success of the phonograph record concession, renders it liable for the unauthorized sales of the `bootleg' records.
. . . . .
". . . [T]he imposition of vicarious liability in the case before us cannot be deemed unduly harsh or unfair. Green has the power to police carefully the conduct of its concessionaire . . .; our judgment will simply encourage it to do so, thus placing responsibility where it can and should be effectively exercised." Id., at 308 (emphasis in original).

In Gershwin Publishing Corp. v. Columbia Artists Management, Inc., 443F.2d 1159 (CA2 1971), the direct infringers retained the contributory infringer to manage their performances. The contributory infringer would contacteach direct infringer, obtain the titles of the musical compositions to be performed, print the programs, and then sell the programs to its own local organizations for distribution at the time of the direct infringement.Id., at 1161. The Court of Appeals emphasized that the contributory infringer had actual knowledge that the artists it was managing were performing copyrighted works, was in a position to police the infringing conduct of the artists, and derived substantial benefit from the actions of the primary infringers. Id., at 1163.
In Screen Gems-Columbia Music, Inc. v. Mark-Fi Records, Inc.,256 F. Supp. 399 (SDNY 1966), the direct infringer manufactured and sold bootleg records. In denying a motion for summary judgment, the DistrictCourt held that the infringer's advertising agency, the radio stations that advertised the infringer's works, and the service agency that boxed and mailed the infringing goods could all be held liable, if at trial it could be demonstrated that they knew or should have known that they were dealing in illegal goods.

3. It seems extraordinary to suggest that the Copyright Act confers upon all copyright owners collectively, much less the two respondents in this case, the exclusive right to distribute VTR's simply because they may be used to infringe copyrights. That, however, is the logical implication of their claim. The request for an injunction below indicates that respondents seek, in effect, to declare VTR's contraband. Their suggestion in this Court that a continuing royalty pursuant to a judicially created compulsory license would be an acceptable remedy merely indicates that respondents, for their part, would be willing to license their claimed monopoly interest in VTR's to Sony in return for a royalty.

4.  It may be rare for large numbers of copyright owners to authorize duplication of their works without demanding a fee from the copier. Inthe context of public broadcasting, however, the user of the copyrightedwork is not required to pay a fee for access to the underlying work. The traditional method by which copyright owners capitalize upon the television medium - commercially sponsored free public broadcast over the public airwaves- is predicated upon the assumption that compensation for the value of displaying the works will bereceived in the form of advertising revenues.
In the context of television programming, some producers evidently believe that permitting home viewers to make copies of their works off the air actually enhances the value of their copyrights. Irrespective of their reasons for authorizing the practice, they do so, and in significant enough numbers to create a substantial market for a noninfringing use of the Sony VTR's. No one could dispute the legitimacy of that market if the producers had authorized home taping of their programs in exchange fora license fee paid directly by the home user. The legitimacy of that market is not compromised simply because these producers have authorized hometaping of their programs without demanding a fee from the home user. The copyright law does not require a copyright owner to charge a fee for the use of his works, and as this record clearly demonstrates, the owner of a copyright may well have economic or noneconomic reasons for permitting certain kinds of copying to occur without receiving direct compensation from the copier. It is not the role of the courts to tell copyright holders the best way for them to exploit their copyrights: even if respondents'competitors were ill-advised in authorizing home videotaping, that would not change the fact that they have created a substantial market for a paradigmatic noninfringing use of Sony's product.

5. Section 107 provides:
"Notwithstanding the provisions of section 106, the fair use of a copyrighted work, including such use by reproduction in copies or phonorecords or by any other means specified by that section, for purposes such as criticism,comment, news reporting, teaching (including multiple copies for classroom use), scholarship, or research, is not an infringement of copyright. Indetermining whether the use made of a work in any particular case is a fair use the factors to be considered shall include -
"(1) the purpose and character of the use, including whether such useis of a commercial nature or is for nonprofit educational purposes;
"(2) the nature of the copyrighted work;
"(3) the amount and substantiality of the portion used in relation to the copyrighted work as a whole; and
"(4) the effect of the use upon the potential market for or value ofthe copyrighted work." 17 U.S.C. 107 (1982 ed.).

6. "The Committee has amended the first of the criteria to be considered- `the purpose and character of the use' - to state explicitly that this factor includes a consideration of `whether such use is of a commercial nature or is for non-profit educational purposes.' This amendment is not intended to be interpreted as any sort of not-for-profit limitation on educational uses of copyrighted works. It is an express recognition that,as under the present law, the commercial or non-profit character of an activity, while not conclusive with respect to fair use, can and should be weighed along with other factors in fair use decisions." H. R. Rep.No. 94-1476, supra, at 66.

7. It has been suggested that "consumptive uses of copyrights by home VTR users are commercial even if the consumer does not sell the home-madetape because the consumer will not buy tapes separately sold by the copyrightholder."Home Recording of Copyrighted Works: Hearing before the Subcommittee on Courts, Civil Liberties and the Administration of Justice of the HouseCommittee on the Judiciary, 97th Cong., 2d Sess., pt. 2, p. 1250 (1982) (memorandum of Prof. Laurence H. Tribe). Furthermore, "[t]he error in excusing such theft as noncommercial," we are told, "can be seen by simple analogy: jewel theft is not converted into a noncommercial veniality if stolen jewels are simply worn rather than sold." Ibid. The premise and the analogy are indeed simple, but they add nothing to the argument. The use to which stolen jewelry is put is quite irrelevant in determining whether depriving its true owner of his present possessory interest in it is venial; becauseof the nature of the item and the true owner's interests in physical possession of it, the law finds the taking objectionable even if the thief does not use the item at all. Theft of a particular item of personal property of course may have commercial significance, for the thief deprives the ownerof his right to sell that particular item to any individual. Time-shifting does not even remotely entail comparable consequences to the copyright owner. Moreover, the time-shifter no more steals the program by watching it once than does the live viewer, and the live viewer is no more likely to buy prerecorded videotapes than is the time-shifter. Indeed, no live viewer would buy a prerecorded videotape if he did not have access to aVTR.

8. "Here plaintiffs assume that people will view copies when they would otherwise be watching television or going to the movie theater. There is no factual basis for this assumption. It seems equally likely that Betamax owners will play their tapes when there is nothing on television they wish to see and no movie they want to attend. Defendants' survey does not show any negative effect of Betamax ownership on television viewing or theater attendance." Id., at 466.

9. The underlying assumptions here are particularly difficult to accept. Plaintiffs explain that the Betamax increases access to the original televised material and that the more people there are in this original audience, the fewer people the rerun will attract. Yet current marketing practices, including the success of syndication, show just the opposite.Today, the larger the audience for the original telecast, the higher the price plaintiffs can demand from broadcasters from rerun rights. Thereis no survey within the knowledge of this court to show that the rerun audience is comprised of persons who have not seen the program. In any event, if ratings can reflect Betamax recording, original audiences may increase and, given market practices, this should aid plaintiffs rather than harm them." Ibid.

10. "This suggestion lacks merit. By definition, time-shift recording entails viewing and erasing, so the program will no longer be on tape when the later theater run begins. Of course, plaintiffs may fear that the Betamaxowners will keep the tapes long enough to satisfy all their interest in the program and will, therefore, not patronize later theater exhibitions. To the extent that this practice involves librarying, it is addressed in section V. C., infra. It should also be noted that there is no evidence to suggest that the public interest in later theatrical exhibitions of motion pictures will be reduced any more by Betamax recording than it already is by the television broadcast of the film." Id., at 467.

11. The Court of Appeals chose not to engage in any "equitable ruleof reason" analysis in this case. Instead, it assumed that the categoryof "fair use" is rigidly circumscribed by a requirement that every such use must be "productive." It therefore concluded that copying a television program merely to enable the viewer to receive information or entertainmentthat he would otherwise miss because of a personal scheduling conflictcould never be fair use. That understanding of "fair use" was erroneous.

Congress has plainly instructed us that fair use analysis calls for a sensitive balancing of interests. The distinction between "productive"and "unproductive" uses may be helpful in calibrating the balance, but it cannot be wholly determinative. Although copying to promote a scholarly endeavor certainly has a stronger claim to fair use than copying to avoid interrupting a poker game, the question is not simply two-dimensional.  For one thing, it is not true that all copyrights are fungible. Some copyrights govern material with broad potential secondary markets. Such material may well have a broader claim to protection because of the greater potential for commercial harm. Copying a news broadcast may have a stronger claimto fair use than copying a motion picture. And, of course, not all uses are fungible. Copying for commercial gain has a much weaker claim to fair use than copying for personal enrichment. But the notion of social "productivity"cannot be a complete answer to this analysis. A teacher who copies to prepare lecture notes is clearly productive. But so is a teacher who copies for the sake of broadening his personal understanding of his specialty. Or a legislator who copies for the sake of broadening her understanding of what her constituents are watching; or a constituent who copies a news program to help make a decision on how to vote.
Making a copy of a copyrighted work for the convenience of a blind person is expressly identified by the House Committee Report as an exampleof fair use, with no suggestion that anything more than a purpose to entertain or to inform need motivate the copying. In a hospital setting, using aVTR to enable a patient to see programs he would otherwise miss has noproductive purpose other than contributing to the psychological well-beingof the patient. Virtually any time-shifting that increases viewer access to television programming may result in a comparable benefit. The statutory language does not identify any dichotomy between productive and nonproductive time-shifting, but does require consideration of the economic consequences of copying.