EARTH BORING DRILL BIT WITH MATRIX DISPLACING MATERIAL,申请号EP19880710036-传众专利搜索

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发明名称	EARTH BORING DRILL BIT WITH MATRIX DISPLACING MATERIAL
摘要
申请公布号	EP0312487(B1)	申请公布日期	1993.09.29
申请号	EP19880710036	申请日期	1988.10.12
申请人	EASTMAN TELECO COMPANY	发明人	TIBBITTS, GORDON A.;HORTON, RALPH M.;LOVATO, LORENZO G.
分类号	B22F7/06;E21B10/46	主分类号	B22F7/06
代理机构		代理人
主权项
地址

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