发明授权
- 专利标题： Educational toy with interchangeable spheres
- 专利标题（中）： 具有可互换球体的教育玩具
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申请号： US13004669申请日： 2011-01-11
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公开(公告)号： US08496483B1公开(公告)日： 2013-07-30
- 发明人: George M. Walters
- 申请人： George M. Walters
- 代理商 Michael I. Kroll
- 主分类号： G09B1/00
- IPC分类号： G09B1/00
摘要：
An educational toy with interchangeable spheres for teaching the user to produce words, progressions, mathematics, patterns and other educational arrangements and sequences comprising a shaft with a permanently affixed stationary sphere on one end and a removable threaded sphere on the other. A plurality of educational balls having various graphics and horizontal throughbores that are slid onto the shaft in a user selected order when the threaded sphere is removed and retained thereon when it is replaced.
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