General Talking Pictures Corp. v. Western Electric Co.

1938-05-16

Headline: Court affirms patent owners’ right to enforce vacuum-tube amplifier patents, upholding infringement finding against a buyer who knowingly bought devices outside a license and allowing continuation-claim priority.

Holding: string (one of schema fields - not used)

Real World Impact:

Makes buyers liable if they knowingly buy patented devices sold outside license.
License notices won’t protect purchasers aware of license limits.
Allows continuation/divisional claims to benefit from earlier application dates when disclosed.

Topics: patent enforcement, licensing restrictions, patent application timing, consumer purchases

Summary

Background

A large telephone company (the American Telephone & Telegraph Company) and its subsidiaries owned patents on vacuum-tube amplifiers used in radio and talking-picture equipment. A licensed manufacturer was allowed to make and sell tubes only for private radio uses, but it sold tubes to a movie-equipment company for use in theaters. The buyer and the manufacturer both knew those sales were outside the license; notices were attached to the boxes but were disregarded.

Reasoning

The Court limited review to the specific questions the buyer raised. It agreed with the lower courts that the licensed maker infringed by selling outside its license and that the buyer, knowing the sales were unauthorized, also violated the patent owners’ rights. Because the buyer purchased with knowledge, the attached license notices did not save it. On a separate issue about later “division” or “continuation” patent filings, the courts found the inventions had been disclosed in earlier applications and not publicly used more than two years earlier, so the continuation claims could relate back to the earlier filing dates.

Real world impact

The ruling affirms that companies who knowingly buy patented parts sold outside a license can be held liable. Sellers who exceed a limited license can be sued. The decision also confirms that continuation or divisional patent claims may keep the earlier application date when the invention was originally disclosed and there was no prohibited public use more than two years earlier. The opinion leaves other factual disputes and some defenses to the lower courts.

Dissents or concurrances

Justice Black dissented, warning this decision expands patent power after sale, criticizes patent-pool practices, and argues continuation filings can wrongly extend monopoly time and control over commerce.