Inside Out Library
[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 39
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OlDREVV B ORWUM CO. ?M0T0-l--THOGfi*eMEM. wASWMOTON. O C. N. BALDWIN. SOUND AMPLIFIEK. APPLICATION FILED ADQ. 29, 1908, 946,096. Patented Jan. 11,1910. 3 SHEETS-SHEET 2. … £^■4,Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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