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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 579

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 579
herein specified of producingsound, by causing primary sounds or articula-tions to act upon a diaphragm, and then con-trolling the exit of a fluid under pressure inharmony with the primary sounds, to producesecondary sounds corresponding with the pri-mary sounds, but of different volume,… … N. PETERS, Photo-Lithographer. Washington, D. C. United States Patent Office. THOMAS A. EDISON;, OF MENLO PARK, NEW JERSEY, ASSIGNOR TOWESTERN UNION TELEGRAPH COMPANY, OF NEW YORK, N. Y. IMPROVEMENT IN SPEAKING-TELEGRAPHS. Specification forming part of Letters Patent No. 203,013, dated April 30,…

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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