United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 257
, o««i« CO. »»OTO-L<T«OOT»l*tK *«m<iTO» 0 C I. W. NORCROSS.APPARATUS FOR COATING SOUND RECORDS WITH ELECTROCONDUCTIVE MATERIAL. APPLICATION FILED NOV. 13, 1909. 952,753. Patented Mar. 22,1910. 2 SHEETS-SHEET 2. -f^ … ^lVvWi^cyy<K>:
Phonograph · Patents
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