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公开(公告)号：US1563734A
公开(公告)日：1925-12-01
申请号：US24616118
申请日：1918-07-22
Applicant: SONORA PHONOGRAPH COMPANY INC
Inventor： PINCUS FARB
IPC: G11B17/00
CPC classification number: G11B17/00
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