Equalizer for sucker rods,申请号US19370133416-传众专利搜索

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发明名称	Equalizer for sucker rods
摘要
申请公布号	US2166426(A)	申请公布日期	1939.07.18
申请号	US19370133416	申请日期	1937.03.27
申请人	DICKSON JAMES T	发明人	DICKSON JAMES T.
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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