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 363
my application No. 61, datedNovember 9, 1872. I claim as my invention— The use of an opposition or secondary bat-tery of weak power at one or more points, toact in the main line in opposition to the pulsa-tions from the transmitting-instrument, to freethe main line of surplus or static… … N. PfTEBS. Pholo-Ulhograptar. Washington. D. C. United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW JERSEY, ASSIGNOR TO HIMSELF ANDGEORGE HARRINGTON, OF WASHINGTON, DISTRICT OF COLUMBIA. IMPROVEMENT IN RELAY-MAGNETS. Specification forming part of Letters Patent,No. 14 1,777, dated August…
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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