Oil well completion equipment,申请号US19370166438-传众专利搜索

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发明名称	Oil well completion equipment
摘要
申请公布号	US2162179(A)	申请公布日期	1939.06.13
申请号	US19370166438	申请日期	1937.09.29
申请人	GRAY TOOL COMPANY	发明人	MUELLER ROBERT A.
分类号	E21B33/03	主分类号	E21B33/03
代理机构		代理人
主权项
地址

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