Combination cup and plunger oil well pump,申请号US19370154870-传众专利搜索

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发明名称	Combination cup and plunger oil well pump
摘要
申请公布号	US2189237(A)	申请公布日期	1940.02.06
申请号	US19370154870	申请日期	1937.07.21
申请人	FRANK WILCOM;THOMPSON ROBERT D	发明人	WILCOM FRANK;THOMPSON ROBERT D.
分类号	F04B47/00;F04B53/12	主分类号	F04B47/00
代理机构		代理人
主权项
地址

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