United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 410
F. W. H. CLAY. METHOD OF BECOBDING AND BEPEODUCING SOUND. APPLICATION FILED OCT. 25, 1907. 1,101,906. Patented June 30, 1914 Fig. i Fig. 2 … 2Q J* T£*.H UP TEH <nB~J| ATTORNEV COLUMBIA PLANOGRAPK CO.. WASHINGTON, D. C.
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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