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[Graphophone patents] (1878)
United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 378
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Patented Oct. 3, 1899. No. 634.326. W. W. CRIDGE. DIAPHRAGM PLATE FOR PHONOGRAPHS, &c. 1 Application filed Mar. 11, 1898.) iNo Model. JF^^'JL' … J*^, ^' Jx^o- 3 /c 9 [[!''■' 'ill III /I- 75-Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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