Inside Out Library
[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 43
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?1j /tc-Tj R. THOMAS.PHONOGRAPH. APPLICATION FILED JUNE 8. 1916. 1,251,592. Patented Jan. 1,1918 3 SHEETS-SHEET 3. / Zlf) _JPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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