MORRIS, District Judge.
On December 30, 1913, United States letters patent No. 1,082,933, for improvements in tungsten and methods of making the same for use as filaments of incandescent electric lamps and for other purposes, was granted to General Electric Company as assignee of William D. Coolidge. In the suit at bar, instituted by General Electric Company against De Forest Radio Company and Robelen Piano Company, the plaintiff charges De Forest Company with contributory...
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