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 469
ith a shunt arouud the receiving-in-strument, containing a resistance or electro-magnet, for the purposes set forth. 2. The combination, with the signaling elec-tro-magnet, placed in the line, of a secondarybattery, also in the line, and a shunt aroundsuch instrument, containing a resistance,… … United States Patent Office. THOMAS A. EDISON, OP NEWARK, NEW JEESET.IMPROVEMENT IN DUPLEX TELEGRAPHS. Specification forming part of Letters Patent No. 168,3§5, dated October 5,1875; application filed January 26, 1875. Case 111. To all whom it may concern : Be it known that I, Thomas A. Edison,…
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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