Changeable road map and information device,申请号US19410404396-传众专利搜索

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发明名称	Changeable road map and information device
摘要
申请公布号	US2374935(A)	申请公布日期	1945.05.01
申请号	US19410404396	申请日期	1941.07.28
申请人	HIGGINS JOHN M	发明人	HIGGINS JOHN M.
分类号	G09B29/06	主分类号	G09B29/06
代理机构		代理人
主权项
地址

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