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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 149
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J06 y \ MIW 1 au«y CO »«rO..,T»0OMP«OB «JI»»OT0«. 0 C p. M. RAVENSKILDE. PHONOGRAPH, APPLICATION FILED OCT. 20, 1908. 948,675 ^^^.J^. Patented Feb. 8,1910. 7 SHEETS—SHEET 7. <y^y^. … yy/ t/7^,^,^es • J3 jjirPhonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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