| 发明名称 |
TRAINING BALLS FOR VARYING BALL SPEED, METHODS OF USE, AND SYSTEMS |
| 摘要 |
<p>Methods and apparatus provide for at least one ball, comprising: a hard shell of a predetermined size defining an internal volume and including a plurality of apertures therethrough; and a foam core disposed within the internal volume.</p> |
| 申请公布号 |
WO2008144210(A1) |
申请公布日期 |
2008.11.27 |
| 申请号 |
WO2008US62726 |
申请日期 |
2008.05.06 |
| 申请人 |
CHANGE-UP CORP.;FREUND, ROBERT, MICHAEL |
发明人 |
FREUND, ROBERT, MICHAEL |
| 分类号 |
A63B37/02 |
主分类号 |
A63B37/02 |
| 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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