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发明名称
数学牌
摘要
每张牌的后视图相同。省略其他牌的后视图、省略其他视图。
申请公布号
CN3011409S
申请公布日期
1991.11.13
申请号
CN91303245.X
申请日期
1991.04.22
申请人
郭坚锐
发明人
郭坚锐
分类号
21-01-T0272
主分类号
21-01-T0272
代理机构
湖南省专利服务中心
代理人
陈立武
主权项
地址
410005湖南省长沙市连升巷图书室
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