| 发明名称 |
Apparatus and method for practicing hitting a baseball |
| 摘要 |
Pitching apparatus delivers a sequence of different kinds of pitches to a batter and prevents a batter from ascertaining from the position of the pitching apparatus the kind of pitch which the apparatus will deliver.
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| 申请公布号 |
US6508243(B1) |
申请公布日期 |
2003.01.21 |
| 申请号 |
US20010918313 |
申请日期 |
2001.07.30 |
| 申请人 |
LONG THOMAS L. |
发明人 |
LONG THOMAS L. |
| 分类号 |
A63B69/00;A63B69/40;(IPC1-7):F41B4/00 |
主分类号 |
A63B69/00 |
| 代理机构 |
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代理人 |
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| 主权项 |
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