Valve for pumps,申请号US19400334856-传众专利搜索

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发明名称	Valve for pumps
摘要
申请公布号	US2274084(A)	申请公布日期	1942.02.24
申请号	US19400334856	申请日期	1940.05.13
申请人	MILLER ROBERT P	发明人	MILLER ROBERT P.
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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