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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 39
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-f J. Yf^ … UKM.W H OUWy CO, PHO-.O-UTMOCRAWOIS. WAWNQTW.. 0 C )*_■■ i?^v v;.i;^^^i• . N. BALDWIN. SOUND AMPLIFIER. APPLICATIOM FILED AU8. 29, 1908. 946,096. PatentedJaiLll, 1910. 3 SHEETS-SHEIT 3. 7SPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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