Water level control roof drain,申请号US19400337956-传众专利搜索

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发明名称	Water level control roof drain
摘要
申请公布号	US2283365(A)	申请公布日期	1942.05.19
申请号	US19400337956	申请日期	1940.05.31
申请人	JOHN C. KUPFERLE FOUNDRY COMPANY	发明人	HEINKEL JOHN
分类号	E04D13/04	主分类号	E04D13/04
代理机构		代理人
主权项
地址

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