Engineering Development Laboratories v. Radio Corp. of America

L. HAND, Circuit Judge.

The plaintiff appeals from a judgment, summarily dismissing its complaint for the infringement of a patent issued to one, Cisin, for an “Amplifying Circuit.” The only question is whether the claims in suit are invalid because they were introduced into the application more than two years after the subject-matter which they cover had been publicly sold. The disclosure is of an electric circuit' which will increase the volume of the electrical pulses produced in a second circuit “in the usual manner by the action of sound waves on the transmitter” (page one, col. two,…