ROLLER CUTTER DRILL BIT,申请号GB19700003705-传众专利搜索

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发明名称	ROLLER CUTTER DRILL BIT
摘要
申请公布号	GB1282226(A)	申请公布日期	1972.07.19
申请号	GB19700003705	申请日期	1970.01.26
申请人	G. W. MURPHY INDUSTRIES INC.	发明人
分类号	E21D9/10;E21B10/22	主分类号	E21D9/10
代理机构		代理人
主权项
地址

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