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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0516306 (1990-04-30) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 7 인용 특허 : 2 |
A batting practice device which comprises an elongated support arm having fastening means at one end for securing the support arm to the side of a post. The fastening means includes an elongated chain which may be wrapped around the post and has one end thereof releasably retained on the support arm
A batting practice device, which comprises: (a) an elongated ball suspension support arm of predetermined length for abutting engagement against a generally vertical post, wherein the support arm has mounting means at one end of said support arm for securing said arm to the post in a cantilever mann
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