Radio Corp. of America v. Emerson

MANTON, Circuit Judge.

The appellee, the Radio Corporation of America, as the sole plaintiff, filed this bill originally, seeking to restrain the appellants from infringing letters patent Nos. 803,684, 879,-532, and 841,387; the infringement consisting of the sale of certain vacuum tubes. An accounting was demanded. The bill of complaint alleged that patents 879,532 and 841,387 were originally issued to one Lee 'De Forest, and that title thereto and to patent No. 803,684 became vested by assignment in the American Telephone & Telegraph Company ■on or about May 24, 1917, and that it has…