Sola Electric Co. v. Jefferson Electric Co.

Background

A company that owned Patent No. 1,777,256 for an electrical transformer granted a non-exclusive license to another company to make and sell the transformers throughout the United States and its territories for a set royalty. The license required the licensee to keep prices, terms, and conditions no more favorable than the owner’s prices. The licensee admitted making some transformers covered by narrow claims (8, 14, and 19) that it did not challenge, but it said broader claims were invalid and sued for a declaration that most claims were invalid so the owner could not collect royalties on those models. The District Court and then the Seventh Circuit dismissed that counterclaim, saying the licensee was estopped — blocked by its contract — from denying the patent’s validity.

Reasoning

The Court asked whether a licensee can be stopped from showing a patent is invalid in order to enforce a price-fixing clause. It held that agreements fixing prices for goods that enter interstate commerce violate the Sherman Act (federal antitrust law) unless they are protected by a valid patent monopoly. State or local rules of estoppel cannot be used to enforce price controls that federal law declares unlawful. The Court said a licensee may therefore offer evidence, including proof the patent is invalid, to show the price restriction is not protected by the patent and is unlawful. The Court reversed the lower court’s decision.

Real world impact

The decision allows licensees to defend against enforcement of price-control clauses by proving invalid patents and prevents state-law estoppel from shielding unlawful price-fixing across state lines. It requires courts to decide such disputes under federal antitrust law rather than local rules.