发明授权
US6135457A Zero zone structure for a dart board 有权
飞镖板的零区结构

  • 专利标题: Zero zone structure for a dart board
  • 专利标题(中): 飞镖板的零区结构
  • 申请号: US263567
    申请日: 1999-03-08
  • 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
Zero zone structure for a dart board
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.
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