최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0063078 (1979-08-02) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 19 인용 특허 : 0 |
A track supported mobile ladder-scaffolding system with self-adjusting lateral supporting structure at the top for engaging a roof by means of a vehicle which engages track structure attachable to a roof by clamping: safety hook structure prevents support failure at the top at roof-engaging and ladd
In a system of mobile scaffolding including vertical structure with a plurality of ladders and means mounting the plurality of ladders movably as a unit on a bottom track for shifting location along the wall of a build- having roof structure, a work platform in said system having means for engaging
※ AI-Helper는 부적절한 답변을 할 수 있습니다.