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发明名称
Gain control for seismograph amplifiers
摘要
申请公布号
US2301739(A)
申请公布日期
1942.11.10
申请号
US19390301674
申请日期
1939.10.27
申请人
SOCONY-VACUUM OIL COMPANY, INCORPORATED
发明人
MINTON JOHN P.;SHOOK EARLEY M.
分类号
G01V1/24
主分类号
G01V1/24
代理机构
代理人
主权项
地址
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