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 473
as my invention—The electro-magnets h and ^ placed in thebridge-circuit between the seudiug-instrumentand the line and artificial lines, respectively,in combination with the second artificial line12 13 and the helices 14 around the cores ofthe electro magnet I, for the purposes set forth. Signed by… … 1PETERS. PHOTO-UTHOQRAPHER, WASHINGTON. D. C. United States Patent Office, THOMAS A. EDISON AND CHARLES BATOHELOR, OF NEWARK, N. J.IMPROVEMENT IN ELECTRIC-SIGNALING INSTRUMENTS. Specification forming part of Letters Patent No. 169.972, dated November 16,1875; application filed March 23, 1875. To…
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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