MR. JUSTICE BLACK delivered the opinion of the Court.
As in Sears, Roebuck & Co. v. Stiffel Co., ante, p. 225, the question here is whether the use of a state unfair competition law to give relief against the copying of an unpatented industrial design conflicts with the federal patent laws. Both Compco and Day-Brite are manufacturers of fluorescent lighting fixtures of a kind widely used in offices and stores. Day-Brite in 1955 secured from the Patent...
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