发明名称 Strike zone pitching aid
摘要 A pitching aid is shown which includes a backstop having sides which define an open interior with a front facing opening. A target is suspended from the backstop within the open interior to define a three dimensional strike-zone. The target has a rigid top and a rigid bottom suspended from the rigid top by flexible sides. Flexible cables connect the rigid bottom to the backstop to suspend the target in tension within the open interior.
申请公布号 US4768784(A) 申请公布日期 1988.09.06
申请号 US19870021204 申请日期 1987.03.03
申请人 WILSON, TED L. 发明人 WILSON, TED L.
分类号 A63B63/06;A63B69/00;(IPC1-7):A63B69/40 主分类号 A63B63/06
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