United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 637
1&-2 f … X 7^z. «yV. /A^^ *■ THE KOR/tIS PfTERS CO.. WASHINGTON. O. C. UNITED STATES PATENT OFFICE. VARIAN M. HARRIS, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-FIFTH TOROBERT BURNS, OF CHICAGO, ILLINOIS. 10 15 20 i25 3° 35 *o *5 ;o DUPLICATING PHONOGRAPH-RECORDS. No. 837,061. Specification of Letters Patent.…
Phonograph · Patents
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