Subsurface well tool control apparatus,申请号US19580739088-传众专利搜索

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发明名称	Subsurface well tool control apparatus
摘要
申请公布号	US2988149(A)	申请公布日期	1961.06.13
申请号	US19580739088	申请日期	1958.06.02
申请人	BAKER OIL TOOLS, INC.	发明人	CONRAD MARTIN B.
分类号	E21B23/01;E21B33/129	主分类号	E21B23/01
代理机构		代理人
主权项
地址

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