HAMLEY, Circuit Judge:
Young Corporation (Young), owner of United States Letters Patent No. 3,082,031, issued to R. H. Lindberg on March 19, 1963, brought this action for patent infringement against Roy F. Jenkins and Dora Jenkins, his wife, dba Doroy Grapple Company. Defendants denied the infringement allegation and counterclaimed for a judgment declaring the Lindberg patent invalid. After a trial without a jury, a judgment was entered adjudicating that the Lindberg...
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