发明名称 TENNIS STROKE TRAINING APPARATUS AND METHOD
摘要 <p>The present invention relates to apparatus and methods for improving a stroke technique for a raquet sport comprising a frame extension or a modified-type racquet frame and a training mat. Other aspects of the invention are also provided.</p>
申请公布号 WO2006017267(A2) 申请公布日期 2006.02.16
申请号 WO2005US24651 申请日期 2005.07.11
申请人 SQUAREHIT SPORTS, INC.;BILSEY, RAYMOND 发明人 BILSEY, RAYMOND
分类号 A63B69/38 主分类号 A63B69/38
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