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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0934786 (2001-08-22) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 12 인용 특허 : 11 |
A training device for baseball hitting has a baseboard, a resilient column with one end securely yet rotatably engaged with the baseboard and a receiving tube securely connected to the other end of the resilient column. The resilient column has a bendable and shapable upper portion. The rotatable en
1. A training device for baseball hitting, comprising: a baseboard; a securing means securely mounted on said baseboard and having an opening defined therein; a resilient column having a lower portion connected to a ball which is rotatably received in said opening of said securing means, and an
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