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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
SG106491(G)
申请公布日期
1992.02.14
申请号
SG19910001064
申请日期
1991.12.14
申请人
CERACON, INC.
发明人
分类号
E21B10/08;E21B10/22;E21B10/50;E21B10/52;(IPC1-7):B22F7/06
主分类号
E21B10/08
代理机构
代理人
主权项
地址
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