SPARKS, Circuit Judge.
This action in equity was instituted by appellants on October 4, 1929. They alleged that they were all residents of Illinois, and were the equitable owners of United States Patent to Robinson, No. 886,541. The patent issued on May 5, 1908. It expired in May, 1925, and Robinson died in December, 1925. Plaintiffs aver that they represent a class of 2,000 other joint equitable owners. They charge the American Car and Foundry Company with infringement...
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