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经营范围
发明名称
Sound reproducing apparatus
摘要
申请公布号
US2311362(A)
申请公布日期
1943.02.16
申请号
US19390311508
申请日期
1939.12.29
申请人
RADIO CORPORATION OF AMERICA
发明人
BELAR HERBERT
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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