发明授权
- 专利标题: Magnetic geometric building system
- 专利标题(中): 磁性几何建筑系统
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申请号: US876516申请日: 1997-06-16
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公开(公告)号: US6017220A公开(公告)日: 2000-01-25
- 发明人: Kenneth D. Snelson
- 申请人: Kenneth D. Snelson
- 专利权人: Snelson; Kenneth D.
- 当前专利权人: Snelson; Kenneth D.
- 主分类号: A63H33/04
- IPC分类号: A63H33/04 ; G09B1/38 ; G09B23/04 ; G09B23/18 ; A63H33/26
摘要:
A construction kit comprising a plurality of connectable magnetic members having north and south magnetic poles on their opposite faces.
公开/授权文献
- US5273029A Endotracheal tube assembly and related method and obturator 公开/授权日:1993-12-28
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