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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 547

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 547
claim as my invention— 1. The air-condenser inserted in the line atthe receiving-station of a chemical telegraph,for the purposes set forth. 2. In a chemical telegraph, the method speci-fied of forming dashes by transmitting, bymeans of perforated paper, a strong currentfollowed by a weak current,… … I united States Patent Office, THOMAS A. EDISON, OF MENLO PABK, NEW JEBSEY.IMPROVEMENT IN STENCIL-PENS. Specification forming part of Letters Patent No. 196,iy4l3, dated November 6, 1877; application filed April 23, 1877. To all whom it may concern: Be it known that I, Thomas A. Edison, ofMenlo…

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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