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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 924
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D. H. WILSON. EECOEDING AND REPRODDOING DEVICE FOE PHONOGRAPHS. APPLICATION FILED DEC. 29, 1904. Patented Dec. 31, 1912. 1,048,924. :nj. 3 -^^ ^/ ryZ a J^.6^, :b^ jsf^ :b, >^j> > ^' JTz^.^. … COLUMBIA PLANOGRAPH CO.. WASMlNGTON, D. C.Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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