L. HAND, Circuit Judge.
This is an appeal from a judgment in an action brought by the plaintiffs to declare invalid Patent No. 1,902,440, issued to Edwin R. Gill, Jr., on March 21, 1933. The defendants, who were the owners of the patent, counterclaimed, first, by asking that Patent No. 2,043,414, issued on June 9, 1936, to Fred H. Korff and owned by the plaintiffs be declared invalid; and, second, that the plaintiffs be enjoined from infringing the Gill patent. The...
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