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 695
setforth, so that any one set of signals may berepeatul independently of any other set, sub-stantially as seD forth. 6. The co mbination, with the receiving-sounders in one line, of repeat i rig-instruments,local circuits and switches, and transmitting-instruments in the other line, arranged… … 2 Sheets—Sheet 2. No. 221,957. T. A. EDISON.Telephone. Patented Nov. 25, 1879.
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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