<p>A tennis racket is made lighter than conventional tennis rackets yet has a higher center of percussion and a higher frequency of vibration. The head of the racket is ovoid, and the widest part of the head is above the longitudinal midpoint of the head. The longitudinal strings are fan-shaped and diverge outwardly and upwardly from the bottom of the head. <IMAGE></p>
申请公布号
DE69410529(T2)
申请公布日期
1999.02.04
申请号
DE1994610529T
申请日期
1994.01.28
申请人
WILSON SPORTING GOODS CO., CHICAGO, ILL., US
发明人
SEVERA, WILLIAM D., ADDISON, ILLINOIS 60101, US;GARRETT, FRANK, BARRINGTON, ILLINOIS, US;CHENG, PO-JEN, OAK BROOK, ILLINOIS 60521, US
