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 475
otas-sium and chloride of sodium. The reaction 105. is of extreme delicacy, the marks being dueprobably to the finely-divided oxide of ruthini-um formed by the electrolytic oxygen.I claim— A recording-point formed of metallic ruthini-um in a chemical telegraph, substantially as setforth. Signed by… … N. PETERS. Photo-Lithographer. Wanhington. D. C. United States Patent Office THOMAS A. EDISON AND CHAELES BATCHELOR, OF NEWARK, N. J.IMPROVEMENT IN ELECTRIC-SIGNALING INSTRUMENTS. Specification forming part of Letters Patent No. 169,972, dated November 16, 1675; application Hied Maxell 23, 1875. 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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