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GEBHARD v. GENERAL MOTORS SALES CORPORATION

No. 8345.

135 F.2d 248 (1943)

GEBHARD et al. v. GENERAL MOTORS SALES CORPORATION et al.

United States Court of Appeals for the District of Columbia.

Decided April 12, 1943.

Attorney(s) appearing for the Case

Mr. John B. Brady, of Washington, D. C., for appellants.

Mr. Drury W. Cooper, of New York City, with whom Mr. John G. Sbarbaro, of Washington, D. C., was on the brief, for appellees.

Before PARKER, Circuit Judge, sitting by designation, and MILLER and EDGERTON, Associate Justices.

EDGERTON, Associate Justice.

Appellants sued appellees for infringement of claims 1 and 2 of appellants' patent No. 1,903,811 for a radio antenna system. Appellants' claims, and also the accused device, consist essentially of telescopically-arranged tubular antenna sections and means for extending or retracting them.

Appellants' claim 1 is for a "radiating" antenna element, and means for controlling its "effective capacity," "in a high frequency transmission...

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