WILBUR, Circuit Judge.
This is an appeal from an interlocutory decree entered in the District Court holding claims 1 and 2 of letters patent No. 1,470,524 granted to Harry B. Burt October 9, 1933, claims 1 and 7 of letters patent No. 1,718,997 granted to him July 2, 1929, claims 2, 3, 4, 5, 6 and 7 of letters patent No. 1,505,592 granted to Frank W. Epperson August 19, 1924, valid and infringed by appellants and enjoining future infringement.
The claimed invention...
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