EXPANSIBLE ROTARY DRILL BIT WITH HYDRAULIC LOCK,申请号CAD900951-传众专利搜索

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发明名称	EXPANSIBLE ROTARY DRILL BIT WITH HYDRAULIC LOCK
摘要
申请公布号	CA900951(A)	申请公布日期	1972.05.23
申请号	CAD900951	申请日期
申请人	ROTARY OIL TOOL COMPANY	发明人	ARCHER W. KAMMERER, JR.
分类号	E21B10/34;(IPC1-7):E21B10/34	主分类号	E21B10/34
代理机构		代理人
主权项
地址

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