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经营范围
发明名称
Dart
摘要
A dart with a dart tip and a cylindrical body. The tail end of the dart is smoothly contoured to promote end-over-end tumbling of the dart as it is thrown towards the dart board.
申请公布号
US7871344(B1)
申请公布日期
2011.01.18
申请号
US20050250132
申请日期
2005.10.13
申请人
MASSMAN STEVEN JOHN
发明人
MASSMAN STEVEN JOHN
分类号
A63B65/02
主分类号
A63B65/02
代理机构
代理人
主权项
地址
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