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经营范围
发明名称
Dispositif éducatif
摘要
申请公布号
FR1323222(A)
申请公布日期
1963.04.05
申请号
FR19620896549
申请日期
1962.05.04
申请人
U. S. INDUSTRIES, INC.
发明人
分类号
G09B3/08
主分类号
G09B3/08
代理机构
代理人
主权项
地址
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