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HELMS PRODUCTS v. LAKE SHORE MANUFACTURING CO.

No. 11407.

227 F.2d 677 (1955)

HELMS PRODUCTS, Inc., Plaintiff-Appellee, v. LAKE SHORE MANUFACTURING COMPANY, Inc., Defendant-Appellant.

United States Court of Appeals Seventh Circuit.

December 1, 1955.

Attorney(s) appearing for the Case

I. Irving Silverman, Myron C. Cass, Chicago, Ill., for defendant-appellant.

Frank E. Liverance, Jr., Grand Rapids, Mich., Edward J. Wendrow, Winston, Strawn, Black & Towner, Chicago, Ill., for plaintiff-appellee.

Before LINDLEY, SWAIM and SCHNACKENBERG, Circuit Judges.

SWAIM, Circuit Judge.

This action for infringement of its United States Letters Patent No. 2,637,132 was brought by the plaintiff, Helms Products, Inc., against the defendant, Lake Shore Manufacturing Company, Inc. The plaintiff charged infringement only of Claim 1 of the patent. The defendant contended that the patent was invalid and that defendant's product did not infringe.

The issues raised by the complaint and answer were referred generally to Special...

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