发明授权
- 专利标题: Zero zone structure for a dart board
- 专利标题(中): 飞镖板的零区结构
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申请号: US263567申请日: 1999-03-08
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公开(公告)号: US6135457A公开(公告)日: 2000-10-24
- 发明人: Chih-Hao Yiu
- 申请人: Chih-Hao Yiu
- 专利权人: Yiu; Chih-Hao
- 当前专利权人: Yiu; Chih-Hao
- 主分类号: F41J3/00
- IPC分类号: F41J3/00
摘要:
A dart board includes a score portion and a zero zone, the zero zone having a plurality of apertures defined by longitudinal ridges and latitudinal ridges, each of the longitudinal ridges and latitudinal ridges has two inclined surfaces defined in two sides thereof so that when the dart hits the ridges, the tip of the dart will be guided into the apertures.
公开/授权文献
信息查询
IPC分类:
F | 机械工程、照明、加热 |
F41 | 武器 |
F41J | 靶;靶场;弹头收集器 |
F41J3/00 | 箭靶或标枪靶,例如用于运动或娱乐的 |