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 795
United States Patent Office, THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY.METHOD OF FORMING ENLARGED ENDS ON CARBON FILAMENTS, SPECIFICATION forming part of Letters Patent No. 239,151, dated March 22, 1881, Application filed November 24, 1880. (Xo model.) To all whom, it may concern: Be it known…
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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