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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 752
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J. SCHIESSLER. SUBMARINE SIGNALING APPARATUS. APPLICATION FILED FES. 8. 1908. Patented Nov. 14, 1916. 1,204,826. 4 SHEETS-SHEET 2. (C JFig:! … ^igrJ' ftnvsvfsv^-'—— htWOTJOT— ^ S9 ™zPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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