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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 107
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GUtoi+wif No. 813,999. PATENTED FEB. 27, 1906. J. T. BROWN.PHONOGRAPH HORN. APPLICATION FILED JUNE 13, 1905. 2 SHEETS—SHEET 2. … James 77 J3rcw/i 3iiu«wtot 9§yPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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