Stiffel Co. was a lamp manufacturer that had created a "pole lamp," a vertical tube standing upright between the floor and ceiling of a room with lamp fixtures along the outside of the tube. Stiffel Co. had secured a
mechanical patent and a
design patent, granted in 1957, on the pole lamp, and the lamp proved a "decided commercial success," according to the Supreme Court decision. Soon after Stiffel had brought the pole lamp to market, the
Sears, Roebuck & Co. department store put on the market copies of the lamp. Stiffel Co. brought suit against Sears, for
patent infringement and for
unfair competition under Illinois law, the latter claim based on Sears' allegedly causing confusion in the trade as to the source of the lamps. The
United States District Court for the Northern District of Illinois held the patents invalid for "want of invention" but ruled Sears to be guilty of unfair competition because the lamps were "confusingly similar." It enjoined Sears from selling the identical lamps and ordered an award of monetary damages to Stiffel Co. The US Supreme Court granted
certiorari to consider whether this use of a state's
unfair competition law was compatible with U.S. patent law. ==Ruling of Supreme Court==