Improvements in or relating to rotary drill bits,申请号GB19980012114-传众专利搜索

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发明名称	Improvements in or relating to rotary drill bits
摘要
申请公布号	GB2326659(B)	申请公布日期	2001.09.05
申请号	GB19980012114	申请日期	1998.06.08
申请人	* CAMCO INTERNATIONAL	发明人	MALCOLM ROY * TAYLOR
分类号	E21B10/54;E21B10/55;(IPC1-7):E21B10/46	主分类号	E21B10/54
代理机构		代理人
主权项
地址

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