United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 983
halt and a smaller pro-portion of stearin pitch, substantially as setforth. 3. A composition for phonographic rec-ords, consisting of asphalt, stearic acid and 60stearin pitch, substantially as set forth. This specification signed and witnessedthis 26th day of May 1906. JONAS W. AYLSWORTH.… … ?o -£&• ? J?
Phonograph · Patents
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