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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0185019 (1980-09-08) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 7 인용 특허 : 0 |
The present invention entails a combination staircase and attic fan assembly designed to share a common attic opening formed within a structure. There is provided a foldable staircase assembly that is mounted adjacent said attic opening and movable between a first operative position within said atti
A combination staircase-attic fan assembly adapted to be utilized in conjunction with an attic opening formed within a structure wherein in one mode the attic fan assumes a position in said attic opening and is operative to exhaust air from the attic portion of the structure and in a second mode the
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