United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 724
C. H. VERITY. SYNCHRONIZATION OF MACHINES FOR RECORDING AND REPRODUCING SOUNDS AND MOVEMENTS. APPLICATION FILED MAY 23, 191?. Patented Nov. 6, 1917. 1,245,834, 4 SHEETS-SHEET 3. FiaS … Ciatve/e A/cuniltoti teritu
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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