Improvements in and relating to ventilating fans,申请号GB19390014465-传众专利搜索

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发明名称	Improvements in and relating to ventilating fans
摘要
申请公布号	GB516216(A)	申请公布日期	1939.12.27
申请号	GB19390014465	申请日期	1939.05.15
申请人	DEREK RICHARD BARKER;WILLIAM HARRY BARKER	发明人
分类号	F04D29/64	主分类号	F04D29/64
代理机构		代理人
主权项
地址

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