Drilling rate recorder,申请号US19480010668-传众专利搜索

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发明名称	Drilling rate recorder
摘要
申请公布号	US2565951(A)	申请公布日期	1951.08.28
申请号	US19480010668	申请日期	1948.02.25
申请人	STANDARD OIL DEVELOPMENT COMPANY	发明人	CROOKSTON ROBERT R.;WATERS JAMES S.
分类号	E21B45/00;E21B47/00	主分类号	E21B45/00
代理机构		代理人
主权项
地址

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