Writing guide for the blind,申请号US19310567252-传众专利搜索

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发明名称	Writing guide for the blind
摘要
申请公布号	US1870145(A)	申请公布日期	1932.08.02
申请号	US19310567252	申请日期	1931.10.06
申请人	ALICE SHARP	发明人	SHARP ALICE
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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