Apparatus for lubricating polish rods,申请号US19490093659-传众专利搜索

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发明名称	Apparatus for lubricating polish rods
摘要
申请公布号	US2674474(A)	申请公布日期	1954.04.06
申请号	US19490093659	申请日期	1949.05.17
申请人	J. M. HUBER CORPORATION	发明人	LISTER ROSCOE C.
分类号	E21B33/08	主分类号	E21B33/08
代理机构		代理人
主权项
地址

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