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发明名称
Well tool
摘要
申请公布号
US1805087(A)
申请公布日期
1931.05.12
申请号
US19270173250
申请日期
1927.03.07
申请人
KENNETH A. WRIGHT;ERNEST KOPPL
发明人
HAMER LELAND S.
分类号
E21B10/00;E21B10/28;E21B10/30
主分类号
E21B10/00
代理机构
代理人
主权项
地址
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