Power control switch for pumping wells,申请号US19450616611-传众专利搜索

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发明名称	Power control switch for pumping wells
摘要
申请公布号	US2572372(A)	申请公布日期	1951.10.23
申请号	US19450616611	申请日期	1945.09.15
申请人	MONTGOMERY JAMES T	发明人	MONTGOMERY JAMES T.
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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