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发明名称
Sound recording system
摘要
申请公布号
US2059472(A)
申请公布日期
1936.11.03
申请号
US19300469435
申请日期
1930.07.21
申请人
FRANK RIEBER, INC.
发明人
METCALF HERBERT E.
分类号
G11B11/00
主分类号
G11B11/00
代理机构
代理人
主权项
地址
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