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发明名称
Base ten primary teaching kit
摘要
A kit containing an Instructor unit sized for presentation to a group and multiple Child training units both set up to allow students to visually model and relate addition, subtraction, multiplication, and division in prinmry mathematics.
申请公布号
US6595778(B1)
申请公布日期
2003.07.22
申请号
US20020061484
申请日期
2002.02.04
申请人
KARABAIC JAMES M.
发明人
KARABAIC JAMES M.
分类号
G09B19/02;(IPC1-7):G09B19/02
主分类号
G09B19/02
代理机构
代理人
主权项
地址
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