AVIS, District Judge.
A patent, involving a street signaling apparatus, and issued to plaintiff Elmer W. Kelley, is the basis of this action. No question is raised as to the right of the plaintiffs to institute the action. The defendants challenge the validity of the patent and deny infringement. The patent in question is No. 1,132,186, dated March 16, 1915, issued upon an application filed December 29, 1913. In the application the purpose and object is stated as...
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