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发明名称
Sound recording system
摘要
申请公布号
US1993795(A)
申请公布日期
1935.03.12
申请号
US19320633264
申请日期
1932.09.15
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
MILLER ROBERT A.
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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