Automatic controls for well drills,申请号US19590842819-传众专利搜索

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发明名称	Automatic controls for well drills
摘要
申请公布号	US2944789(A)	申请公布日期	1960.07.12
申请号	US19590842819	申请日期	1959.09.28
申请人	LE GATE OSBORNE W	发明人	GATE OSBORNE W. LE
分类号	E21B19/08	主分类号	E21B19/08
代理机构		代理人
主权项
地址

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