发明名称 Method and apparatus for teaching a user how to hit a ball with a bat
摘要 Disclosed is an apparatus for teaching a user how to hit a ball with a bat. The apparatus includes a telescopically adjustable tee assembly that is magnetically secured to an underlying base. A user can easily make adjustments to both the vertical height of the tee and its location upon the base in order to simulate different pitch types.
申请公布号 US7354360(B1) 申请公布日期 2008.04.08
申请号 US20040922111 申请日期 2004.08.19
申请人 ECKSPORTS, LLC 发明人 ECKSTEIN RICK
分类号 A63B71/00 主分类号 A63B71/00
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