- 专利标题: Ball rotation indicator and method
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申请号: US15373827申请日: 2016-12-09
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公开(公告)号: US09968837B2公开(公告)日: 2018-05-15
- 发明人: Adam W. Johnston
- 申请人: Adam W. Johnston
- 主分类号: A63B69/00
- IPC分类号: A63B69/00 ; A63B43/00 ; A63B24/00 ; A63B71/06
摘要:
The present application is directed to an athletic training tool. The athletic training tool includes a ball and an elongated member attached thereto, the elongated member is attached to the ball in a manner effective to maintain the center of gravity of the ball. The elongated member may be visually observable during use of the athletic training tool.
公开/授权文献
- US20170087433A1 Ball Rotation Indicator and Method 公开/授权日:2017-03-30
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