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发明名称
DIRECTIONAL RADIO SYSTEM
摘要
申请公布号
CA392394(A)
申请公布日期
1940.11.05
申请号
CAD392394
申请日期
申请人
CANADIAN MARCONI COMPANY
发明人
GASTON ADELIN MATHIEU
分类号
主分类号
代理机构
代理人
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地址
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