Back-flow preventer for water closets,申请号US19590828575-传众专利搜索

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发明名称	Back-flow preventer for water closets
摘要
申请公布号	US3023424(A)	申请公布日期	1962.03.06
申请号	US19590828575	申请日期	1959.07.21
申请人	LITVIN THOMAS H	发明人	LITVIN THOMAS H.
分类号	E03D11/13	主分类号	E03D11/13
代理机构		代理人
主权项
地址

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