Improvements in signs or display devices,申请号GB19460016706-传众专利搜索

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发明名称	Improvements in signs or display devices
摘要
申请公布号	GB620691(A)	申请公布日期	1949.03.29
申请号	GB19460016706	申请日期	1947.05.29
申请人	WOLF HIRSCHHORN	发明人
分类号	G09F13/04	主分类号	G09F13/04
代理机构		代理人
主权项
地址

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