Improvements in and relating to electric signs,申请号GB19490017734-传众专利搜索

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发明名称	Improvements in and relating to electric signs
摘要
申请公布号	GB679838(A)	申请公布日期	1952.09.24
申请号	GB19490017734	申请日期	1949.07.05
申请人	ROBERT SIEFF;S. TRUP & COMPANY LIMITED	发明人
分类号	G09F13/00	主分类号	G09F13/00
代理机构		代理人
主权项
地址

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