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发明名称
Drill bit
摘要
申请公布号
GB2328966(B)
申请公布日期
2002.02.20
申请号
GB19980019356
申请日期
1998.09.04
申请人
* SMITH INTERNATIONAL, INC.
发明人
JAMES C * MINIKUS;CHRIS E * CAWTHORNE;STEPHEN C * STEINKE;GARY RAY * PORTWOOD;GARY EDWARD * GARCIA;DAVID P * MORAN
分类号
E21B10/16;E21B10/52;(IPC1-7):E21B10/16
主分类号
E21B10/16
代理机构
代理人
主权项
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