Backflow prevention apparatus,申请号US19440522575-传众专利搜索

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发明名称	Backflow prevention apparatus
摘要
申请公布号	US2538281(A)	申请公布日期	1951.01.16
申请号	US19440522575	申请日期	1944.02.16
申请人	SNYDER LEONARD L	发明人	SNYDER LEONARD L.
分类号	E03C1/10;F16K15/06	主分类号	E03C1/10
代理机构		代理人
主权项
地址

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