ROLLING CUTTER DRILL BIT,申请号EP19810301218-传众专利搜索

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发明名称	ROLLING CUTTER DRILL BIT
摘要
申请公布号	EP0038125(A3)	申请公布日期	1981.11.11
申请号	EP19810301218	申请日期	1981.03.23
申请人	REED ROCK BIT COMPANY	发明人	SCHUMACHER, PERCY WILLIAM
分类号	E21B10/16;E21B10/52;(IPC1-7):E21B10/08	主分类号	E21B10/16
代理机构		代理人
主权项
地址

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