Writing aid for the blind,申请号US19490068952-传众专利搜索

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发明名称	Writing aid for the blind
摘要
申请公布号	US2562479(A)	申请公布日期	1951.07.31
申请号	US19490068952	申请日期	1949.01.03
申请人	CURRY SPIKES JOHN	发明人	SPIKES JOHN CURRY
分类号	G09B21/00	主分类号	G09B21/00
代理机构		代理人
主权项
地址

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