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发明名称
RADIO DIRECTION-INDICATING SYSTEMS
摘要
申请公布号
CA483577(A)
申请公布日期
1952.05.27
申请号
CAD483577
申请日期
申请人
THE DECCA RECORD COMPANY LIMITED
发明人
WILLIAM JOSEPH O'BRIEN
分类号
主分类号
代理机构
代理人
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