BACK PRESSURE VALVE FOR DRAINAGE SYSTEMS,申请号CAD312262-传众专利搜索

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发明名称	BACK PRESSURE VALVE FOR DRAINAGE SYSTEMS
摘要
申请公布号	CA312262(A)	申请公布日期	1931.06.16
申请号	CAD312262	申请日期
申请人	EDWARD W. N. BOOSEY	发明人	EDWARD W. N. BOOSEY
分类号		主分类号
代理机构		代理人
主权项
地址

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