This is an action for infringement of Young and Gephart patent No. 1,589,581 (application, December 28, 1922; issue, June 22, 1926), covering a "ventilator", brought against the assignee of the patent. The trial court determined that the patent was valid but not infringed. From that portion of the decree determining noninfringement the plaintiff appeals. From those portions of the decree determining validity...
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