Cutting structure of a drill bit and a fixed cutter drill bit,申请号GB19970021963-传众专利搜索

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发明名称	Cutting structure of a drill bit and a fixed cutter drill bit
摘要
申请公布号	GB9721963(D0)	申请公布日期	1997.12.17
申请号	GB19970021963	申请日期	1995.08.08
申请人	SMITH INTERNATIONAL INC.	发明人
分类号	E21B10/42;E21B10/43;E21B10/54;E21B10/55;E21B10/56;E21B10/567	主分类号	E21B10/42
代理机构		代理人
主权项
地址

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