THOMAS, Circuit Judge.
The appellees brought suit in the district court charging appellants with infringement of the Hawkinson patents No. 1,917,261 and No. 1,917,262. The defenses are invalidity and no infringement. There was a decree for the plaintiffs and the defendants appeal.
Both patents pertain to the art of retreading worn automobile tire casings. A tire casing is the outer part of the tire within which the inner tube is placed. It is made of fabric...
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