Apparatus for drilling well boreholes,申请号US19500175932-传众专利搜索

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发明名称	Apparatus for drilling well boreholes
摘要
申请公布号	US2684835(A)	申请公布日期	1954.07.27
申请号	US19500175932	申请日期	1950.07.26
申请人	STANDARD OIL DEVELOPMENT COMPANY	发明人	MOORE THOMAS V.
分类号	E21B7/18;E21B17/07;E21B21/00;E21B44/00	主分类号	E21B7/18
代理机构		代理人
主权项
地址

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