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 809
(No Model.) T. A. EDISON.Relay for Telegraphs. No. 239,154. Patented March 22, 1881. … attest; y?. -ZT o£ c s o N.PETERS, PHOTO-LITHOGRAPHER, WASHINGTON, 0 C United States Patent Office. THOMAS A. EDISON, OF MENLO PAEK. NEW JERSEY.RELAY FOR TELEGRAPHS. SPECIFICATION forming part of Letters Patent No. 239,154, dated March 22, 1881. Application filerl December 14, 1880. (No model.) 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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