Backwater check means for drainage systems,申请号US19550518448-传众专利搜索

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法人/股东/高管

发明名称	Backwater check means for drainage systems
摘要
申请公布号	US2882923(A)	申请公布日期	1959.04.21
申请号	US19550518448	申请日期	1955.06.28
申请人	MICHAEL SMOLENSKY	发明人	SMOLENSKY MICHAEL
分类号	E03F7/04;F16K15/03	主分类号	E03F7/04
代理机构		代理人
主权项
地址

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