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-0053488 (1993-04-28) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 57 인용 특허 : 0 |
A lockable cover for a ground opening such as a manhole or catch basin. The cover has a lock including a reciprocating locking bolt mounted to its underside for engagement of a lip of a surrounding support. The bolt is accessible directly from above the cover through an aperture in the cover. In one
A cover for installation on a support atop a ground opening such as a manhole, catch basin or the like, the cover being dimensioned to fit within walls of the support to preclude substantial lateral movement of the cover with respect to the support, and the support having a lip directed inwardly of
※ AI-Helper는 부적절한 답변을 할 수 있습니다.