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经营范围
发明名称
ELECTRICAL SOUND RECORDING APPARATUS
摘要
申请公布号
CA353241(A)
申请公布日期
1935.09.24
申请号
CAD353241
申请日期
申请人
THE RADIO CORPORATION OF AMERICA
发明人
GLENN L. DIMMICK
分类号
主分类号
代理机构
代理人
主权项
地址
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