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AMERICAN AIR FILTER CO. v. AIR MAZE CORPORATION

No. 5560.

45 F.Supp. 977 (1940)

AMERICAN AIR FILTER CO. v. AIR MAZE CORPORATION.

District Court, N. D. Ohio, E. D.

May 15, 1940.

Attorney(s) appearing for the Case

Arthur F. Robert, of Louisville, Ky., and Hadley F. Freeman, of Cleveland, Ohio, for plaintiff.

George S. Baldwin (of Hyde & Meyer), of Cleveland, Ohio, for defendant.

WILKIN, District Judge.

The bill of complaint alleges infringement of U. S. Letters Patent 1,521,575 issued December 20, 1924, to Hans Wittemeier, and now owned by the plaintiff; and prays for the usual remedies of injunction and accounting. Claims 3 and 6 only are relied upon. The answer alleges invalidity because of anticipation, denies infringement, and charges laches and estoppel.

The patent covers improvements in filters for purifying air. The claims...

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