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经营范围
发明名称
BORKRONE.
摘要
申请公布号
NO871037(A)
申请公布日期
1987.09.14
申请号
NO19870001037
申请日期
1987.03.13
申请人
SMITH INTERNATIONAL INC.
发明人
FYFE, GEORGE;JONES, KENNETH WILLIAM
分类号
E21B10/50;E21B10/52;E21B10/56;E21B10/567;E21B10/62;(IPC1-7):E21B/
主分类号
E21B10/50
代理机构
代理人
主权项
地址
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