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发明名称
Baseball pitching practice target with ball and strike indicators
摘要
申请公布号
US3157399(A)
申请公布日期
1964.11.17
申请号
US19600026786
申请日期
1960.05.04
申请人
PSYCHOLOGICAL TRAINING DEVICES CORPORATION
发明人
GAUDET FREDERICK J.
分类号
A63B63/00
主分类号
A63B63/00
代理机构
代理人
主权项
地址
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