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发明名称
An arithmetic aid
摘要
申请公布号
ZA200601982(B)
申请公布日期
2007.05.30
申请号
ZA20060001982
申请日期
2006.03.08
申请人
GOVENDER, JOHANATHAN
发明人
GOVENDER, JOHANATHAN
分类号
G09B
主分类号
G09B
代理机构
代理人
主权项
地址
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