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发明名称
Educational blocks
摘要
A novel set of large letters of the alphabet and numbers with tracks for their support and combination is provided for manufacture as both an educational and a creative plaything.
申请公布号
US4802854(A)
申请公布日期
1989.02.07
申请号
US19880185898
申请日期
1988.04.25
申请人
DAVIS, PAULINE D.
发明人
DAVIS, PAULINE D.
分类号
A63F9/00;G09B17/00;(IPC1-7):G09B1/06;A63H33/10
主分类号
A63F9/00
代理机构
代理人
主权项
地址
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