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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0695901 (1991-05-06) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 49 인용 특허 : 0 |
A school desk has legs adapted to be lengthened for raising the desk. The legs are provided with a sleeve adapted to fittingly slide on the legs. The legs have a transversal perforation, and the sleeves have a set of vertically disposed holes. A screw and nut combination is used to lock the sleeves
A school desk having at least three legs adapted to be lengthened for raising the height of the desk, said legs having a rectangular cross-section and a perforation extending perpendicularly across the legs at a location adjacent the lower end thereof, a sleeve member having four lateral walls formi
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