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 did not appear when the cartridges were inserted into a Genesis III console. Sega offered to make the cartridges available for inspection by Accolade’s counsel, but declined to let Accolade’s software engineers examine the cartridges or to reveal the manner in which the cartridges had been modified. The district court concluded that the TMSS code was not functional and that Accolade could not assert a functionality defense to Sega’s claim of trademark infringement.

With respect to Sega’s copyright claim, the district court rejected Accolade’s contention that intermediate copying of computer object code does not constitute infringement under the Copyright Act. It found that Accolade had disassembled Sega’s code for a commercial purpose, and that Sega had likely lost sales of its games as a result of Accolade’s copying. The court further found that there were alternatives to disassembly that Accolade could have used in order to study the functional requirements for Genesis compatibility. Accordingly, it also rejected Accolade’s fair use defense to Sega’s copyright infringement claim.

Based on its conclusion that Sega is likely to succeed on the merits of its claims for copyright and trademark infringement, on April 3, 1992, the district court enjoined Accolade from: (1) disassembling Sega’s copyrighted code; (2) using or modifying Sega’s copyrighted code; (3) developing, manufacturing, distributing, or selling Genesis-compatible games that were created in whole or in part by means that included disassembly; and (4) manufacturing, distributing, or selling any Genesis-compatible game that prompts the Sega Message. On April 9, 1992, in response to a request from Sega, the district court modified the preliminary injunction order to require the recall of Accolade’s infringing games within ten business days.

On April 14, 1992, Accolade filed a motion in the district court for a stay of the preliminary injunction pending appeal. When the district court failed to rule on the motion for a stay by April 21, ten business days after the April 9 recall order, Accolade filed a motion for an emergency stay in this court pursuant to 9th Cir.R. 27-3, together with its notice of appeal. On April 23, we stayed the April 9 recall order. The April 3 preliminary injunction order remained in effect until August 28, when we ordered it dissolved and announced that this opinion would follow.

In order to obtain a preliminary injunction, the movant must demonstrate “either a likelihood of success on the merits and the possibility of irreparable injury, or that serious questions going to the merits were raised and the balance of hardships tips sharply in its favor.” Johnson Controls, Inc. v. Phoenix Control Systems, Inc., 886 F.2d 1173, 1174 (9th Cir.1989). We may reverse the district court’s grant of a preliminary injunction to Sega if the district court abused its discretion, made an error of law, or based its decision on an erroneous legal standard or on clearly erroneous findings of fact. Religious Technology Ctr. v. Scott, 869 F.2d 1306, 1309 (9th Cir.1989); Lou v. Belzberg, 834 F.2d 730, 733 (9th Cir.1987), ''cert. denied'', 485 U.S. 993, 108 S.Ct. 1302, 99 L.Ed.2d 512 (1988).

Accolade raises four arguments in support of its position that disassembly of the object code in a copyrighted computer program does not constitute copyright infringement. First, it maintains that intermediate copying does not infringe the exclusive rights granted to copyright owners in section 106 of the Copyright Act unless the end product of the copying is substantially similar to the copyrighted work. Second, it argues that disassembly of object code in order to gain an understanding of the ideas and functional concepts embodied in the code is lawful under section 102(b) of the Act, which exempts ideas and functional concepts from copyright protection. Third, it suggests that disassembly is authorized by section 117 of the Act, which entitles the lawful owner of a copy of a computer program to load the program into a computer. Finally, Accolade contends