National Theatre Supply Co. v. Da-Lite Screen Co.

LINDLEY, District Judge.

Appellee brought suit in the District Court charging infringement of the patent to Heck, No. 1,819,776. Appellant answered, and the cause was referred to a master, who concluded that the patent was valid and infringed. The court overruled exceptions to the report and entered a decree enjoining appellant from manufacture or sale of the accused structures. This appeal followed.

Appellant contends that the patent is invalid because of: (1) Insufficient disclosure of the alleged invention; (2) lack of foundation for the claim in the specifications; (3) anticipation; and (4)…