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发明名称
Batting practice device
摘要
A batting practice device employs a rotatable arm to which a practice ball is mounted. The arm is adapted to be set at an inclination relative to ground level to improve batting skill. Simple height adjustment and braking are provided.
申请公布号
US4699377(A)
申请公布日期
1987.10.13
申请号
US19850721158
申请日期
1985.04.08
申请人
PONZA, LARRY
发明人
PONZA, LARRY
分类号
A63B69/00;(IPC1-7):A63B69/40
主分类号
A63B69/00
代理机构
代理人
主权项
地址
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