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发明名称
Drill bit
摘要
申请公布号
GB2326897(B)
申请公布日期
2002.05.01
申请号
GB19980014159
申请日期
1998.06.30
申请人
* SMITH INTERNATIONAL, INC.
发明人
JOHN ADAM * MEYERS;CARL W * KEITH;HUY D * BUI
分类号
E21B10/56;E21B10/567;(IPC1-7):E21B10/16;E21B10/36
主分类号
E21B10/56
代理机构
代理人
主权项
地址
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