| 发明名称 |
Instructional device for tennis players |
| 摘要 |
An instructional device is provided for tennis players to identify their stroke problems and to analyze the cause of those stroke problems. In addition, the instructional device of the present invention includes a grip analysis section to help tennis players identify and correct their grip problems.
|
| 申请公布号 |
US4711633(A) |
申请公布日期 |
1987.12.08 |
| 申请号 |
US19860846006 |
申请日期 |
1986.03.31 |
| 申请人 |
DOMBROWSKI, MICHAEL A. |
发明人 |
DOMBROWSKI, MICHAEL A.;EIKELAND, NANCY M. |
| 分类号 |
A63B69/38;G09B1/22;G09B19/00;(IPC1-7):G09B1/22 |
主分类号 |
A63B69/38 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
