发明名称 Magnetic Induction Dart
摘要 A dart comprises: a body, a shaft, a flight, a tip, and a magnetic member. The body is formed with a receiving space, the magnetic member is detachably disposed in the receiving space of the body and is located between the body and the shaft. The tip is made of magnetic induction material. The magnetic member can be assembled and disassembled easily, and the magnetic induction material of the tip is attracted by the magnetic member to produce lines of magnetic force.
申请公布号 US2007080498(A1) 申请公布日期 2007.04.12
申请号 US20060538471 申请日期 2006.10.04
申请人 YIU CHIH-HAO 发明人 YIU CHIH-HAO
分类号 F41J3/00 主分类号 F41J3/00
代理机构 代理人
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