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发明名称
CONTRADIRECTIONAL COUPLERS
摘要
申请公布号
US3587004(A)
申请公布日期
1971.06.22
申请号
USD3587004
申请日期
1969.09.23
申请人
SYLVANIA ELECTRIC PRODUCTS INC.
发明人
LEONARD I. PARAD
分类号
H01P5/16;H01Q3/34;H01Q21/20;(IPC1-7):H01P5/14
主分类号
H01P5/16
代理机构
代理人
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