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发明名称
An educational aid.
摘要
申请公布号
ZA9704168(B)
申请公布日期
1998.06.23
申请号
ZA19970004168
申请日期
1997.05.14
申请人
VICTOR JAMES NOBLE
发明人
VICTOR JAMES NOBLE
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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