United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 199
£lttot»v»<j UIOK^ a OMMM CO. (*0I0.UTW)IUUlPOIS, V.»S««OTO», D t 950,428. F. P. BECK. DUPLEX REPRODUCER FOR PHONOGRAPHS. APPLICATION PILED SEPT. 4, 1907. Patented Feb. 22,1910. 2 SHEETS-SHEET 2.
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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