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DeFOREST RADIO CO. v. GEN. ELEC. CO.

No. 630.

283 U.S. 664 (1931)

DeFOREST RADIO CO. v. GENERAL ELECTRIC CO.

Supreme Court of United States.

Decided May 25, 1931.

Attorney(s) appearing for the Case

Messrs. Thomas G. Haight and Samuel E. Darby, Jr., with whom Messrs. Carl A. Richmond and William R. Ballard were on the brief, for petitioner.

Mr. Ralph B. Evans, with whom Messrs. Hubert Howson, Paxson Deeter, and Albert G. Davis were on the brief, for respondent.

Messrs. John F. Neary, Ramsay Hoguet, and Martin Fisher, by special leave of Court, filed a brief on behalf of The Chemical Foundation, Inc., et al., as amici curiae.

MR. JUSTICE STONE delivered the opinion of the Court.

Certiorari was granted, 282 U.S. 836, to review a judgment of the Court of Appeals for the Third Circuit, holding the Langmuir Patent, No. 1,558,436, granted October 20, 1925, for "electrical discharge apparatus and process of preparing and using the same," valid, and infringed by petitioners. The District Court for Delaware, in which respondent, the assignee of the patent...

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