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经营范围
发明名称
RADIO TUBE NOISE ELIMINATING SYSTEM
摘要
申请公布号
CA344750(A)
申请公布日期
1934.09.18
申请号
CAD344750
申请日期
申请人
THE RADIO CORPORATION OF AMERICA
发明人
CLARENCE WESTON HANSELL
分类号
主分类号
代理机构
代理人
主权项
地址
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