<p>A tennis racquet or other athletic instrument configured for striking a moveable ball or other playing element includes electronic sensors for providing an audible or audio-visual indication of the location on the racquet or instrument at which contact is made with the ball or other playing element. Various devices for sensing the location of contact are disclosed.</p>
申请公布号
AU531009(B2)
申请公布日期
1983.08.04
申请号
AU19790049004
申请日期
1979.07.17
申请人
CONREY, R.N., MCQUAID, P.T. AND YURSIS, P.J.
发明人
RICHARD N. CONREY;PHILLIP T. MCQUAID;PAUL J. YURSIS