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HAZELTINE CORP. v. ELECTRIC SERVICE ENGINEERING CORP.

18 F.2d 662 (1926)

HAZELTINE CORPORATION et al. v. ELECTRIC SERVICE ENGINEERING CORPORATION.

District Court, S. D. New York.

July 1, 1926.

Attorney(s) appearing for the Case

Pennie, Davis, Marvin & Edmonds, of New York City (William H. Davis and Willis H. Taylor, Jr., both of New York City, of counsel), for plaintiffs.

Leonard Day, of New York City (William L. Morris, of New York City, of counsel), for defendant.

THACHER, District Judge (after stating the facts as above).

The Hazeltine method of neutralizing capacity coupling between two electrical circuits relates primarily to the art of radio reception, although the claims of his first patent are not confined to use in this field. The development of this art by Fleming, De Forest, and Armstrong is shown in Marconi Wireless T. Co. v. De Forest Radio T. & T. Co. (C. C. A.) 243 F. 560, and Armstrong v. De Forest Radio Telephone...

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