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发明名称
ROLLING CUTTERS FOR DRILL BITS, AND PROCESSES TO PRODUCE SAME
摘要
申请公布号
EP0169717(A3)
申请公布日期
1986.12.30
申请号
EP19850305163
申请日期
1985.07.19
申请人
CDP, LTD.
发明人
ECER, GUNES M.
分类号
E21B10/08;E21B10/22;E21B10/50;E21B10/52;(IPC1-7):E21B10/50;B22F7/06
主分类号
E21B10/08
代理机构
代理人
主权项
地址
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