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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0514845 (1983-07-18) |
발명자 / 주소 |
|
대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 14 인용 특허 : 1 |
An insulating cover is disclosed for enclosing an opening in a building floor containing a folding stairs which has a pair of tracks mounted adjacent the opening. An inverted box-like structure of sufficient size to cover the opening has sides which fit and are movable in the tracks to enable the bo
1. An insulating cover adapted to enclose an opening in a building floor containing a folding stairs, said cover comprising: (a) a pair of tracks connected to the building in spaced apart, parallel relationship to each other adjacent said opening, (b) an inverted box-like structure of sufficient
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