Braille book reader,申请号US19540423336-传众专利搜索

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发明名称	Braille book reader
摘要
申请公布号	US2891324(A)	申请公布日期	1959.06.23
申请号	US19540423336	申请日期	1954.04.15
申请人	ZUK GERALD H	发明人	ZUK GERALD H.
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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