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 663
T. A. EDISON.Sex tup lex-Tele graph. No. 217,781. Patented July 22, 1879. … United States Patent Office THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGNOR TOWESTERN UNION TELEGRAPH COMPANY, OF NEW YORK, N. Y. IMPROVEMENT IN SEXTUPLEX TELEGRAPHS. Specification forming part of Letters Patent No. 217,781, dated July 22, 1879; application filed May 14, 1877. To all whom it…
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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