The Bendix Corporation (Formerly the Sheffield Corporation by Merger Into the Bendix Corporation) v. Freeland Gauge Company

PHILLIPS, Circuit Judge.

This is an appeal by appellant, the Bendix Corporation, from the judgment of the District Court in this patent infringement action, holding claims 9 to 13, inclusive, and 15 of the United States Patent 2,593,957 issued to Willis Fay Aller on April 22, 1952, to be invalid and unenforceable. Reference is made to the published opinion of District Judge Fred W. Kaess for a comprehensive statement of the facts. 271 F.Supp. 888 (E.D. Mich.)

We affirm.

The patent alleged to be infringed upon is the last of four related patents on air gauges issued to Aller and acquired by…