Improvements relating to display cards,申请号GB19330004684-传众专利搜索

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发明名称	Improvements relating to display cards
摘要
申请公布号	GB398729(A)	申请公布日期	1933.09.21
申请号	GB19330004684	申请日期	1933.02.15
申请人	HARRY CECIL JOHNSON;LAURENCE EDWARD JOHNSON	发明人
分类号	G09F5/04	主分类号	G09F5/04
代理机构		代理人
主权项
地址

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