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发明名称
Well jar
摘要
申请公布号
US2621024(A)
申请公布日期
1952.12.09
申请号
US19460696880
申请日期
1946.09.13
申请人
LEO T. KOPPL
发明人
KOPPL ERNEST;KOPPL LEO T.
分类号
E21B31/107;E21B31/113
主分类号
E21B31/107
代理机构
代理人
主权项
地址
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