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发明名称
Monitoring for sound systems
摘要
申请公布号
US2233914(A)
申请公布日期
1941.03.04
申请号
US19380205239
申请日期
1938.04.30
申请人
RADIO CORPORATION OF AMERICA
发明人
COLLINS MILFORD E.
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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