Valve and well tool utilizing the same,申请号US19600003366-传众专利搜索

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发明名称	Valve and well tool utilizing the same
摘要
申请公布号	US3078862(A)	申请公布日期	1963.02.26
申请号	US19600003366	申请日期	1960.01.19
申请人	UNION OIL COMPANY OF CALIFORNIA	发明人	MALY GEORGE P.
分类号	E21B43/12	主分类号	E21B43/12
代理机构		代理人
主权项
地址

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