发明名称 BASEBALL SWING TRAINING AID
摘要 A baseball bat swing training aid includes a housing configured for storing a plurality of balls therein. A ball positioning mechanism is disposed within the housing and includes an arm selectively extendable out of the housing. A ball holder is disposed on an end of the arm. The baseball bat swing training aid further includes a mechanism for removably yet securely fixing the ball positioning mechanism within the housing.
申请公布号 US2007167262(A1) 申请公布日期 2007.07.19
申请号 US20060428931 申请日期 2006.07.06
申请人 发明人 LORTSCHER LANE
分类号 A63B69/00 主分类号 A63B69/00
代理机构 代理人
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