General Electric Co. v. Independent Lamp & Wire Co.

HAIGHT, District Judge.

This suit is for an infringement of letters patent No. 1,082,933, granted to W. D. Coolidge December 30, 1913. The answer denies infringement. One of the issues, there*826fore, is whether the defendant does infringe. The plaintiff’s patent contains 34 claims, the first 23 of which cover a process and the last 11a product.

[1] The first interrogatory asks whether the defendant had manufactured, sold, or used “incandescent electric lamps having filaments of drawn tungsten wire.” It follows exactly the language of the twenty-fifth claim of the patent. The third interrogatory…