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 1045
ther applications heretofore filed by 45me. I claim as my invention— The combination, in a telephone, of a dia-phragm, twospring-arms attached to the same,one of which is insulated, a carbon button be- 50tween the said arms, a contractile spring ap-plied to the arms, and the circuit… … United States Patent OfficEc THOMAS A. EDISON, OF MENLO TAEK, NEW JERSEY.TELEPHONE. SPECIFICATION forming part of Letters Patent No. 257,677, dated May 9, 1882. Application filed October IT, 1881. (No model.) Patented in England -Tune 15, 1878. { To all whom it may concern: Be it known tbat I,…
Trade catalogs · Patents · Edison, Thomas A. (Thomas Alva), 1847-1931 · Inventions · Telegraph · Electric machinery · Electric apparatus and appliances · Phonograph · Telephone · Motors
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
