DRILL BIT WITH SET OF UNDERREAMER ARMS,申请号EP19970932181-传众专利搜索

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法人/股东/高管

发明名称	DRILL BIT WITH SET OF UNDERREAMER ARMS
摘要
申请公布号	EP0847477(A1)	申请公布日期	1998.06.17
申请号	EP19970932181	申请日期	1997.06.11
申请人	HOLTE, ARDIS L.	发明人	HOLTE, ARDIS L.
分类号	E21B10/26;E21B4/14;E21B10/32;E21B10/36;E21B10/66;E21B21/16;(IPC1-7):E21B10/66	主分类号	E21B10/26
代理机构		代理人
主权项
地址

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