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经营范围
发明名称
LINEAERT EKSTRAPOLERENDE FILTER.
摘要
申请公布号
NO882362(A)
申请公布日期
1988.11.29
申请号
NO19880002362
申请日期
1988.05.27
申请人
TELECO OILFIELD SERVICES INC
发明人
FREY, JAMES E.;STOHRER-HOYT, WILLIAM
分类号
E21B19/09;E21B47/00;E21B47/04;G01V1/38;(IPC1-7):E21B44/00
主分类号
E21B19/09
代理机构
代理人
主权项
地址
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