Potter Stewart

“ To the contrary, that opinion repeatedly emphasized the anticompetitive effects of the particular types of leases held illegal, and carefully explained that the purpose of requiring that customers in the future be given an option to purchase was to create an eventual second-hand market in United's machines and to make the machines available to United's competitors, so that they might study and copy them. ”

“ Another section of the decree, § 5, went further and provided that in the future United's machines must be offered for sale as well as for lease. But it is a commonplace that 'relief, to be effective, must go beyond the narrow limits of the proven violation,' United States v. ”

“ So it follows, as the Court says, ' (i) f the 1953 judgment is not prima facie evidence of the illegality of the practice from which Hanover's asserted injury arose, then Hanover, having offered no other convincing evidence of illegality, should not have recovered at all.' Ante, at 484. ”