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U.S. patents issued to Thomas A. Edison from 1883-88
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/uspatentsissuedt00unit
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Collection of United States patents granted to Thomas A. Edison, 1869-1884 v. 1
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/collectionunitev1edis
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Collection of United States patents granted to Thomas A. Edison, 1869-1884 v.2
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/collectionunitevol2edis