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发明名称
EDUCATIONAL APPARATUS
摘要
申请公布号
GB9103768(D0)
申请公布日期
1991.04.10
申请号
GB19910003768
申请日期
1991.02.22
申请人
KING, REGINALD A;AITKEN, KATHLEEN M
发明人
分类号
G09B5/04;G06F3/01;G06F3/16;G06F17/30;G06Q50/00;G09B5/06;G09B17/00;G09B19/04;G09B19/06;G10L13/00;G10L13/04;G10L13/06;G10L21/04;G10L21/06
主分类号
G09B5/04
代理机构
代理人
主权项
地址
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