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发明名称
Valve for use in well tubing
摘要
申请公布号
US2855952(A)
申请公布日期
1958.10.14
申请号
US19540464362
申请日期
1954.10.25
申请人
JERSEY PRODUCTION RESEARCH COMPANY
发明人
TAUSCH GILBERT H.;III JAMES R. DUBLIN
分类号
E21B43/12
主分类号
E21B43/12
代理机构
代理人
主权项
地址
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