Foldable ladder
US5944141A · kind A · utility
13Cited by
12References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Jun 12, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06C5/30
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A foldable ladder having rungs pivotally connected to the side rails, allowing the side rails to pivot from a position wherein the siderails are coplanar to the rung to a support position wherein the side rails are normal to the rungs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.