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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 85
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No. 811,900. PATENTED FEB. 6, 1906.J. T. BROWN.FOLDING PHONOGRAPH HORN. APPLICATION FILED DEC. 31, 1904. 3- … ^UQ £Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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