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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0495827 (1995-06-28) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 5 인용 특허 : 3 |
A device for blocking stairs which is attached to the vertically-extending side panels of a stairway. A pair of expanding support elements is wedged between the side panels and separated from each other by a few steps. A material sheet is attached to, and extends between, the pair of expanding suppo
A device attached to the vertically-extending side panels of a stairway for blocking access to the steps comprising: a pair of axially-extending support rods, each rod being adapted to expand horizontally across the stairway and be frictionally retained between the side panels with said rods being s
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