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发明名称	SYSTEM FOR EDUCATION BY CORRESPONDENCE
摘要
申请公布号	JPH07199793(A)	申请公布日期	1995.08.04
申请号	JP19930354001	申请日期	1993.12.28
申请人	DAINIPPON PRINTING CO LTD	发明人	TAKAHASHI TATSUMI;HIRATA ISAO;FURUYA MASAO;TOCHIHARA SEIICHI;KOIKE YASUO;SAITO MASA;UENO KOYO
分类号	G09B19/00;B42D15/08;B65H37/04;(IPC1-7):G09B19/00	主分类号	G09B19/00
代理机构		代理人
主权项
地址

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