United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 110
^nc^u.^ JT^^Ls^ ^Q^HIt- ATTORNEYfS. . PHOTO-LITMO., WASHINQTON, D. C. (No Model.) 4 Sheets—Sheet 4. L. ROSENTHAL & S. FRANK. APPARATUS FOR REPRODUCING SOUNDS. No. 474,410. Patented May 10, 1892. … WITNESSES: ^ota^i
Phonograph · Patents
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