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 713
electric conductors so that only 85a portion of the surface of such carbon con-ductors shall be exposed for radiating light, as set forth. 4. The method herein described of securingthe platina contact-wires to the carbon fila- gqment and carbonizing of the whole in a closedchamber, substantially as… … N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON. D. C. United States Patent Office THOMAS A. EDISON, OF MENLO PARK, NEW JEESEY.ELECTRIC-LIGHTING APPARATUS. SPECIFICATION forming part of Letters Patent No. 224,329, dated February 10, 1880. Application filed February 3, 1879. To all whom it may concern: Be…
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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