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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | UP-0454768 (2006-06-16) |
등록번호 | US-7516512 (2009-07-01) |
발명자 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 10 인용 특허 : 4 |
A castor includes a main body, two rollers each rotatably mounted on the main body, a stop member movable in the main body between a first position where the stop member is located at a height higher than that of each of the two rollers and a second position where the stop member is located at a hei
The invention claimed is: 1. A castor, comprising: a main body; two rollers each rotatably mounted on the main body; a stop member movably mounted in the main body and movable between a first position where the stop member is located at a height higher than that of each of the two rollers and a sec
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