| 发明名称 |
Magnetically detectable tennis ball |
| 摘要 |
<p>A tennis ball is provided with magnetically detectable properties while still meeting USTA specifications. The magnetic properties are provided by sponge iron powder which is formed from magnetite iron ore. The sponge iron powder is blended with the rubber which is used to mold the core of the ball. <IMAGE></p> |
| 申请公布号 |
EP0563938(B1) |
申请公布日期 |
1995.12.13 |
| 申请号 |
EP19930105370 |
申请日期 |
1993.03.31 |
| 申请人 |
WILSON SPORTING GOODS COMPANY |
发明人 |
MILLER, ROBERT A. |
| 分类号 |
A63B43/00;A63B45/00;A63B71/06;(IPC1-7):A63B39/00 |
主分类号 |
A63B43/00 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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