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PERFECT CIRCLE CO. v. HASTINGS MFG. CO.

No. 7115.

88 F.2d 813 (1937)

PERFECT CIRCLE CO. v. HASTINGS MFG. CO.

Circuit Court of Appeals, Sixth Circuit.

March 4, 1937.

Attorney(s) appearing for the Case

Frank Parker Davis and Harry W. Lindsey, Jr., both of Chicago, Ill. (Knappen, Uhl, Bryant & Snow, of Grand Rapids, Mich., on the brief), for appellant.

Otis A. Earl, of Kalamazoo, Mich. (Chappell & Earl, of Kalamazoo, Mich., and Charles S. Burton, of Chicago, Ill., on the brief), for appellee.

Before HICKS, SIMONS, and ALLEN, Circuit Judges.

SIMONS, Circuit Judge.

The appellant complains of a decree, holding invalid for want of invention Teetor patent No. 1,414,796, issued May 2, 1922, for improvement in engines.

The Teetor patent is for a combination in an engine, with the cylinder thereof of a hollow piston having a circumferential groove and a packing ring within the groove. The combination of three such elements is, of course, old. The reciprocating piston within a hollow cylinder for the...

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