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发明名称
DIRECTIVE RADIO SYSTEM
摘要
申请公布号
CA357802(A)
申请公布日期
1936.05.12
申请号
CAD357802
申请日期
申请人
THE WESTERN ELECTRIC COMPANY
发明人
EDMOND BRUCE
分类号
主分类号
代理机构
代理人
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