Elevator for sucker rods, tubing, etc.,申请号US19300463167-传众专利搜索

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发明名称	Elevator for sucker rods, tubing, etc.
摘要
申请公布号	US1796779(A)	申请公布日期	1931.03.17
申请号	US19300463167	申请日期	1930.06.23
申请人	THE S. M. JONES COMPANY	发明人	DALE DUDLEY R.
分类号	E21B19/06	主分类号	E21B19/06
代理机构		代理人
主权项
地址

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