Rod weight compensator for well pumps,申请号US19520314261-传众专利搜索

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发明名称	Rod weight compensator for well pumps
摘要
申请公布号	US2687697(A)	申请公布日期	1954.08.31
申请号	US19520314261	申请日期	1952.10.11
申请人	REILLY JOHN B	发明人	REILLY JOHN B.
分类号	E21B17/00	主分类号	E21B17/00
代理机构		代理人
主权项
地址

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