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 629
e chargeand discharge of the same to correspond withthat of the main line, substantially as andfor the purpose specified. 2. The retractile magnet u, combined withthe magnet h and polarized magnet t, that actsto momentarily break the circuit of u when thereversal of polarity takes place,… … PETERS, PHOTO-LITHOGRAPHER, WASHINGTON, D. C. United States Patent Office. rHOMAS A. EDISON, OP MENLO PARK, NEW JERSEY, ASSIGNOR TO WESTERNUNION TELEGRAPH COMPANY, OF NEW YORK, N. Y. IMPROVEMENT IN SPEAKING-TELEPHONES. Specification forming part of Letters Patent No. 208,299, dated September 24,…
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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