United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 355
/& ^%^ ^r- vsv // … 1-vueri fo-t- Mcola$ Kol6y, \^^kA&aaW*v_ Qttoi VUM* UNITED STATES PATENT OFFICE. NICOLAS KOLBY, OF CHICAGO, ILLINOIS.SOUND-CONTROL MECHANISM. 1,256,025. Specification of Letters Patent. Patented Feb. 12, 1918. Application filed June 14, 1917. Serial No. 174,717. To all whom it may concern: Be…
Phonograph · Patents
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