Union Switch & Signal Co. V. Frog
-
- 0,99 €
-
- 0,99 €
Descrição da editora
The patent in suit is reissue No. 17,252 issued April 2, 1929, to Snavely and Wells and assigned to appellant. The original patent, No. 1,676,466, was granted July 10, 1928, for an electrical relay, designed primarily for use in operating a flashing