Subsurface well bore packing element,申请号US19580782328-传众专利搜索

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发明名称	Subsurface well bore packing element
摘要
申请公布号	US2988148(A)	申请公布日期	1961.06.13
申请号	US19580782328	申请日期	1958.12.22
申请人	BAKER OIL TOOLS, INC.	发明人	CONRAD MARTIN B.;MUSE JOHN F.
分类号	E21B33/127	主分类号	E21B33/127
代理机构		代理人
主权项
地址

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