Roosevelt v. Western Electric Co.

The case made by the motion papers is this: The complainant’s patent is for an improvement in electric batteries, consisting of a prism and other elements, and the claims are for the prism, and for various elements in combination with it. The defendant is selling an electric battery which contains the prism in combination with the several other elements which are covered by the claims of the patent; having purchased the prisms from complainant, but having obtained the other elements of the battery from •other sources.

If it were true that the prisms are not capable of any use except in…