Collection of United States patents granted to Thomas A. Edison, 1869-1884 (1869)
Edison, Thomas A. (Thomas Alva), 1847-1931, Peters, N. (Norris), lithographer, Hammer, William Joseph, 1858-1934, former owner. DSI, Edison, Thomas A. (Thomas Alva), 1847-1931, inscriber. DSI, United States. Patent Office · Washington, D.C. : U.S. Patent Office · leaf 359
ing to the arrangement and number ofthe punches. I claim as my invention— A group of punches for perforating tele-graphic paper, actuated by a separate electro-magnet to each punch, in combination with the circuit-bars I and a range of finger-keys,for selecting the circuits that are to be closedto… … United States Patent Office. THOMAS A. EDISON, OF NEWABK, NEW JEESEY, ASSIGNOR TO HIMSELF ANDGEOEGE HAEBINGTON, OF WASHINGTON, DISTEIOT OF COLUMBIA. IMPROVEMENT IN CIRCUITS FOR AUTOMATIC TELEGRAPHS. Specification forming part of Letters Patent No. 141,7 dated August 12,1873; application filed…
Trade catalogs · Patents · Edison, Thomas A. (Thomas Alva), 1847-1931 · Inventions · Telegraph · Electric machinery · Electric apparatus and appliances · Phonograph · Telephone · Motors
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