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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 92
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H. A. MYERS. SOUND BOX. APPLICATION FILED JULY 22,1915. Patented July-24, 1917. 1,234,198. … 'A ATTORNEYPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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