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发明名称
Detector for telephone surreptitious listening techniques
摘要
申请公布号
US2875285(A)
申请公布日期
1959.02.24
申请号
US19570656164
申请日期
1957.04.30
申请人
HIGHTOWER EARLE D
发明人
HIGHTOWER EARLE D.
分类号
H04M1/68
主分类号
H04M1/68
代理机构
代理人
主权项
地址
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