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 593
2 Sheets-Sheet 2. T. A. EDISON.Speaking-Telegraph.No. 203,014. Patented April 30, 1878. … United States Patent Office. THOMAS A.EDISON, OF MENLO PAEK, NEW JEESEY, ASSIGNOK TO WESTERNUNION TELEGRAPH COMPANY, OE NEW YORK, N. Y. IMPROVEMENT IN SPEAKING-TELEGRAPHS. Specification forming part of Letters Patent No. 203,014, dated April 3Q, 1878; application filed July 20, 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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