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 423
ht atthe end of a lever, in combination with a cir-cuit-closer and connections, substantially asset forth. 3. A telegraphic alarm and signaling appa-ratus, formed of two or more levers with cir-cuit-closing surfaces contained within a box,with finger-pieces outside said box, substan-tially as… … N. PETERS. Pholo-Lithograplwf. Wothington, 0. C. United States Patent Office* THOMAS A. EDISON, OF NEWAEK, NEW JEESET, ASSIGNOR TO HIMSELFAND GEOEGE HAEEINGTON, OF WASHINGTON, DISTRICT OF COLUMBIA. IMPROVEMENT IN DUPLEX CHEMICAL TELEGRAPHS. Specification forming part of Letters Patent No. 156,813,…
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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