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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 485

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 485
of the other, and the connections to thebatteries and line-wires, so as to transmitpositive or negative currents by the perforat-ed paper, with stylus-points of different met-als, arranged one in advance of the other, sothat one marks with a negative, and the otherwith a positive, current,… … United States Patent Office. THOMAS A. EDISON, OF NEWAEK, NEW JERSEY, ASSIGNOR TO HIMSELFAND GEORGE HARRINGTON, OF WASHINGTON, D. 0. IMPROVEMENT IN AUTOMATIC TELEGRAPHY. Specification forming part of Letters Patent No. 1Y3«718, dated February 22,1876; application filed January 15, 1875. To all whom…

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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