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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 666
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Patented June 19, 1900. No. 652,152. E. TREITSCHKE. PHONOGRAPHIC CLOCK. (Application filed July 15, 1899.) 2 Sheets— Sheet 2. (No Model.) JTi/r.b … TuM JrTyireTiilor T'W/ i PETERS CO, PHOTO-LIThO.. WASHINGTON. 0Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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