Inside Out Library
[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 943
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1918. M. B, PEAL. PHONOGRAPH.APPLICATION FILED APR. 20. I9!6. 1,265,502. 6 Patented May 7,1918.Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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