Device for program teaching,申请号GB19620021180-传众专利搜索

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发明名称	Device for program teaching
摘要
申请公布号	GB982427(A)	申请公布日期	1965.02.03
申请号	GB19620021180	申请日期	1962.06.01
申请人	NATIONAL BLANK BOOK COMPANY	发明人
分类号	B42D5/00;G09B1/00	主分类号	B42D5/00
代理机构		代理人
主权项
地址

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