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经营范围
发明名称
Wear-resisting drill pipe coupling
摘要
申请公布号
US3074767(A)
申请公布日期
1963.01.22
申请号
US19590856835
申请日期
1959.12.02
申请人
AMERICAN IRON & MACHINE WORKS COMPANY, INC.
发明人
ROSENBERG EDGAR L. VON
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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