发明授权
- 专利标题： Racket, and more particularly a tennis racket
- 专利标题（中）： 球拍，更具体地是网球拍
-
申请号： US358178申请日： 1989-05-26
-
公开(公告)号： US4976433A公开(公告)日： 1990-12-11
- 发明人: Hans Pohlenz , Gunter Wagner
- 申请人： Hans Pohlenz , Gunter Wagner
- 申请人地址： DEX Koblenz-Neuendorf
- 专利权人： Stabilus GmbH
- 当前专利权人： Stabilus GmbH
- 当前专利权人地址： DEX Koblenz-Neuendorf
- 优先权： DEX3818152 19880528
- 主分类号： A63B51/12
- IPC分类号： A63B51/12
摘要：
According to an illustrative example of this invention, a gas spring is incorporated into a tennis racket. This gas spring is connected with some of the strings such as to maintain a predetermined tension within the strings irrespective of possible elongation of the strings during operation.
公开/授权文献
- US6113992A Laser making techniques 公开/授权日：2000-09-05