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U.S. patents issued to Thomas A. Edison from 1883-88 (1900)
United States. Patent Office, Edison, Thomas A. (Thomas Alva), 1847-1931 · [Washington, D.C.] : The Office · leaf 608
(No Model.) T. A. EDISON. MANUFAOTUEE OF CARBON CONDUCTORS. No. 354,310. Patented Dec. 14, 1886. … ^y^ INVENTOR: AT TEST: ^7Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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