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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0671862 (1984-11-15) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 24 인용 특허 : 4 |
A tray for use with ladders having hollow rungs opening to the side is disclosed, with the device being supported by a resilient member which is inserted into the rung and expanded against the inside of the rung by applying a compression force to the ends of the member, which holds the device firmly
A ladder tray, comprising: a. a member shaped so as to be capable of placement within a hollow ladder rung, and which expands about its circumference in response to compression by pressure being applied to each end thereof; b. a bar slideably running through said member and being relatively large on
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