SANBORN, Circuit Judge.
This case involves the validity, and the alleged infringement of Claim 1, of United States Letters Patent No. 2,392,513 issued to Edward W. Town on January 8, 1946, upon an application filed April 8, 1942, for a "Cushion for Artificial Dentures."
The appellees are, respectively, the owner and the exclusive licensee of the patent. As plaintiffs they brought this action for infringement against the defendant (appellant), who makes and...
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