## Facts

- The United States sued United States Gypsum Company (USG), several competing gypsum manufacturers, and individual officers under Sherman Act §§ 1 and 2, alleging an industry-wide scheme to restrain trade and monopolize gypsum products in interstate commerce.
- USG was the dominant gypsum-board producer in the relevant region and controlled key patents, including patents covering “closed-edge” gypsum board.
- Beginning in the 1920s, USG issued patent licenses to competing manufacturers; the licenses included provisions allowing USG to set minimum prices at which licensees sold products embodying the patents.
- Through the licensing program, USG fixed licensee prices and controlled terms of sale across much of the industry.
- The government alleged coordinated conduct beyond patented products, including eliminating unpatented board competition, standardizing products and production methods, regulating distribution, and stabilizing prices of related unpatented products.
- The complaint was amended to assert invalidity of certain patent claims; the district court granted partial judgment against the government on standing to attack patent validity in this antitrust case.
- After the government rested, the district court granted defendants’ Rule 41(b) motion to dismiss for failure to show entitlement to relief, finding no unlawful conspiracy.
- The United States appealed directly to the Supreme Court under the Expediting Act.

## Issues

1. Whether an industry-wide patent-licensing program that fixes prices and controls distribution and production violates Sherman Act §§ 1 and 2, notwithstanding asserted patent rights.
2. Whether substantially identical licenses among competitors, entered with knowledge of industry-wide adherence and resulting price control, can support an inference of concerted action.
3. Under Fed. R. Civ. P. 52(a), when an appellate court may set aside trial-court findings as “clearly erroneous” in reviewing a no-conspiracy determination.
4. Whether the United States may challenge patent validity in an antitrust action when patents are invoked to justify the alleged restraints (addressed but not decided as necessary to disposition).

## Decision

- The Supreme Court reversed the judgment dismissing the complaint and remanded for further proceedings.
- The Court held the evidence made out an unlawful conspiracy to restrain trade and monopolize through a licensing program that fixed prices and regimented competitive conditions.
- The Court held the conduct was not immunized by patent law; a patent does not authorize industry-wide price fixing or broad control over distribution and competition.
- The Court held that a pattern of separate but similar license agreements among competitors, coupled with knowledge of others’ participation and the program’s competitive effects, supports a strong inference of concerted action.
- The Court articulated and applied the Rule 52(a) standard: findings are “clearly erroneous” when the reviewing court, considering the entire record, is left with a definite and firm conviction that a mistake has been committed.
- The Court treated defendants’ asserted motives or business justifications as legally irrelevant to the Sherman Act violation found.

## Legal Principles

- Patent rights do not confer antitrust immunity for licensing schemes that fix prices, suppress competition, standardize products to exclude rivals, or control distribution on an industry-wide basis.
- A conspiracy may be inferred where competitors enter a series of separate but substantially identical agreements with knowledge that parallel adherence will produce common control over competitive variables (including price).
- Under Rule 52(a), a trial court finding is “clearly erroneous” when, despite some supporting evidence, the appellate court reviewing the whole record has a definite and firm conviction that a mistake was made.
- For restraints treated as unlawful under the Sherman Act, asserted good motives or industry-stabilization aims do not legalize the conduct.
- Where an unlawful restraint is established irrespective of patent validity, resolving patent-validity challenges may be unnecessary to decide the antitrust violation.

## Conclusion

The Court held that a dominant firm’s patent-licensing program cannot lawfully be used to impose industry-wide price control and related restraints, that parallel uniform licenses can support an inference of conspiracy, and that appellate courts may reverse contrary trial findings under the Rule 52(a) “clearly erroneous” standard.


United States v. United States Gypsum Co., 333 U.S. 364 (1948)