Improvements in and relating to advertising display devices,申请号GB19380033383-传众专利搜索

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发明名称	Improvements in and relating to advertising display devices
摘要
申请公布号	GB521369(A)	申请公布日期	1940.05.20
申请号	GB19380033383	申请日期	1938.11.17
申请人	JOHN ELLWOOD ROME	发明人
分类号	G09F5/00	主分类号	G09F5/00
代理机构		代理人
主权项
地址

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