Appellants, the respective owners of the patents here involved, charged appellees with infringing claims 7, 8, 10, 11 and 12 of United States patent No. 2,036,757 to Hume, and claim 1 of United States patent No. 2,029,561 to DuSang. The former was issued April 7, 1936, on an application filed December 3, 1932. The latter was issued February 4, 1936, on an application filed April 4, 1934. Infringement of neither patent is denied, and the only issues presented are whether either patent discloses patentable invention. The District Court held that neither did, and dismissed the action for lack of merit. From that judgment this appeal is prosecuted.
