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HAZELTINE CORPORATION v. NATIONAL CARBON CO.

No. 261.

47 F.2d 573 (1931)

HAZELTINE CORPORATION v. NATIONAL CARBON CO., Inc., et al.

Circuit Court of Appeals, Second Circuit.

February 2, 1931.

Attorney(s) appearing for the Case

Drury W. Cooper, C. Blake Townsend, and H. Frank Wiegand, all of New York City, for appellants.

Pennie, Davis, Marvin & Edmonds, of New York City (William H. Davis, Willis H. Taylor, Jr., and R. Morton Adams, all of New York City, of counsel), for appellee.

Before MANTON, SWAN, and AUGUSTUS N. HAND, Circuit Judges.

MANTON, Circuit Judge.

The Hazeltine patent sued on, claims 1, 2, 5, and 13, is for plate circuit neutralization, a specific form of eliminating the undesirable effects of regeneration in audion amplifiers. Hazeltine Corp. v. Wildermuth (C. C. A.) 34 F.2d 635. The court found infringement as well as validity. The principal argument against validity below and here is an anticipation urged in the form of the BC — 59 —...

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