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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 451

An illustration from Collection of United States patents granted to Thomas A. Edison, 1869-1884, 1869, leaf 451
he reaction is very delicate. I prefer touse the protosalt of iron in the form of theprotosulphate of iron. Chloride of sodiumadded to the solution increases the delicacy. I claim as my invention— The combination of a protosalt of iron, sul-pho-cyanide of potassium, and a non-oxidizablestylus, for… … N.PETERS. PHOTO-LITHOGRAPHER, WASHINGTON, United States Patent Office. THOMAS A. EDISON, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE GOLDAND STOCK TELEGRAPH COMPANY, OF NEW YORK, N. Y. IMPROVEMENT IN PRINTING-TELEGRAPHS. Specification forming part of Letters Patent No. 168,004, dated September 21,1875;…

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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