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 1449
charging the same with an active carbon-reducing agent in gaseous form, again ex-hausting and charging, the two latter opera- tions being repeated as often as necessary, thecast-iron being meanwhile maintained at ahigh heat, substantially as set forth. This specification signed and witnessed… … WITNESSES: INVENTOR: BY ATTORNEY , RS, Photo-Lithographer, United States Patent Office, THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY,•v SYSTEM OF UNDERGROUND CONDUCTORS FOR ELECTRICAL DISTRIBUTION. SPECIFICATION forming part of Letters Patent No. 273,828, dated March 13, 1883. Application filed…
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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