INGERSOLL-RAND CO. v. BLACK & DECKER MFG. CO.

No. 6261.

192 F.2d 270 (1951)

INGERSOLL-RAND CO. et al. v. BLACK & DECKER MFG. CO.

United States Court of Appeals Fourth Circuit.

Decided November 5, 1951.


Attorney(s) appearing for the Case

Stephen H. Philbin, New York City (Chester A. Adee, New York City, and Frank B. Ober, Baltimore, Md., on the brief), for appellants.

Albert R. Golrick, Cleveland, Ohio (Thomas W. Y. Clark, Baltimore, Md., on the brief), for appellee.

Before SOPER and DOBIE, Circuit Judges, and WYCHE, District Judge.


DOBIE, Circuit Judge.

This is a typical suit for patent infringement. The patent in question is United States Patent No. 2,012,916, August 27, 1935, issued to Robert H. Pott for an impact tool. Black & Decker Manufacturing Company, defendant here, put the accused device, an automatic wrench, upon the market in 1949. This was done after years of study by defendant's research department and after an opinion by competent patent attorneys that defendant's wrench did...

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