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UNITED STATES v. DE FOREST RADIO TELEPHONE & TELEGRAPH CO.

No. 549.

18 F.2d 338 (1927)

UNITED STATES et al. v. DE FOREST RADIO TELEPHONE & TELEGRAPH CO. et al.

District Court, D. Delaware.

February 15, 1927.

Attorney(s) appearing for the Case

Clifton V. Edwards and Harry Knight, Sp. Asst. Attys. Gen., and David J. Reinhardt, U. S. Atty., of Wilmington, Del., for plaintiffs.

Samuel E. Darby, Jr., of New York City, for defendants De Forest Radio Telephone & Telegraph Company and Lee De Forest.

Drury W. Cooper, H. Frank Wiegand (of Cooper, Kerr & Dunham), and Thomas Ewing, all of New York City, for defendants Westinghouse Electric & Mfg. Co. and Edwin H. Armstrong.

Harry E. Dunham, of Schenectady, N. Y., and William G. Mahaffy, of Wilmington, Del., for defendants General Electric Co. and Irving Langmuir.

William R. Ballard, of New York City, for defendant American Telephone & Telegraph Co.

MORRIS, District Judge.

In the four-party interference in the Patent Office of De Forest v. Langmuir v. Armstrong v. Meissner, the Court of Appeals of the District of Columbia awarded priority to De Forest (54 App. D. C. 391, 298 F. 1006), and pursuant thereto patent No. 1,507,016 was issued to De Forest on September 2, 1924. Thereafter the suit at bar was instituted, under R. S. § 4915 (Comp. St. § 9460), by Meissner and his assignee, the United States...

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