SIMONS, Circuit Judge.
The four patents in suit, all held valid and infringed by the District Court, relate to the so-called "permanent" hair waving art. The appeals, while involving separate plaintiffs and defendants, are from decisions below in cases arising out of the same alleged act of infringement, tried as one, and argued and briefed together on review. The Herold Brothers Company is a dealer, and acquired the devices which it sold from Naivette, Inc. The patents...
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