Check valve device,申请号US19420428601-传众专利搜索

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发明名称	Check valve device
摘要
申请公布号	US2347199(A)	申请公布日期	1944.04.25
申请号	US19420428601	申请日期	1942.01.28
申请人	LANGDON JESSE D	发明人	LANGDON JESSE D.
分类号	F16K15/03	主分类号	F16K15/03
代理机构		代理人
主权项
地址

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