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经营范围
发明名称
ELECTRICAL NETWORK
摘要
申请公布号
CA376525(A)
申请公布日期
1938.09.20
申请号
CAD376525
申请日期
申请人
RADIO CORPORATION OF AMERICA
发明人
IRVING WOLFF
分类号
主分类号
代理机构
代理人
主权项
地址
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