DE FOREST v. HARTLEY

Nos. 1761, 1762.

10 F.2d 901 (1926)

DE FOREST v. HARTLEY et al. WHITE v. DE FOREST et al.

Court of Appeals of District of Columbia.

Decided January 4, 1926.


Attorney(s) appearing for the Case

S. E. Darby and S. E. Darby, Jr., both of New York City, and C. M. Thomas and F. D. Thomas, both of Washington, D. C., for appellant De Forest.

A. D. Lunt and H. E. Dunham, both of Schenectady, N. Y., and I. J. Adams, of New York City, for appellant White.

F. T. Woodward, G. W. Rich, and J. W. Schmied, all of New York City, for appellee.

Before MARTIN, Chief Justice, ROBB, Associate Justice, and SMITH, Judge of the United States Court of Customs Appeals.


ROBB, Associate Justice.

Appeals from a decision of the Patent Office in an interference proceeding awarding priority to the party Hartley.

The invention relates to wireless signaling systems that involve the use of an audion or "electron discharge device" for producing continuous electrical waves of radio frequency. The audion is provided with three electrodes, designated plate, grid, and filament. In these systems it was usual to apply modulating potentials...

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