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 179
agnet and thecompound printing-magnet in a printing-tele-graph instrument, in combination with a localconstant circuit connected to one set of spoolsin such magnets, and the main-line currentconnected to the other spools of such magnets,to be operated substantially in the manner andfor the purposes… … 128,606 United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW JERSEY.IMPROVEMENT IN PRINTING-TELEGRAPHS. Specification forming part of Letters Patent No. 128,606, dated July 2,1872. To all whom it may concern: Be it known that I, Thomas A. Edison, ofNewark, in the county of Essex and State…
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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