Inside Out Library
[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 169
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J. H. MOUNT. TALKING MACHINE,APPLICATION PILED MAY 9, 1908. 949,939. Patented Feb. 22,1910. 5BHEET8-8HEET 3. … WITNESSES ) INVENTORPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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