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发明名称
PASSIVELY CONTROLLED DUPLEXER-COUPLER APPLIED TO A HELICAL ANTENNA FOR USE IN A BOREHOLE PENETRATING AN EARTH FORMATION
摘要
申请公布号
US3582766(A)
申请公布日期
1971.06.01
申请号
USD3582766
申请日期
1969.11.13
申请人
KEIGO IIZUKA
发明人
KEIGO IIZUKA
分类号
G01S1/02;G01S19/36;G01V3/30;H01Q1/36;(IPC1-7):G01V3/12;G01V3/18
主分类号
G01S1/02
代理机构
代理人
主权项
地址
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