Hazeltine Corp. v. Wildermuth

MANTON, Circuit'Judge.

Appellee sues for infringement of patent No. 1,533,858, granted April 14, 1925, to Hazeltine. Claims 1, 2, 5, 9, 11,12, 14, and 16 are relied upon. The appellant, a dealer, is a purchaser from the Atwater Kent Manufacturing Company of four types referred to as models 20, 30, 32. and 35, which have all been held to infringe the patent. The patent relates to the control-of undesired regenerative effects, especially oscillation, by means of neutralizing circuits.

In the radio tube operation, as an amplifier of either radio or audio currents and of regenerative amplification,…