Platform for stairs
US4457397A · kind A · utility
19Cited by
6References
1Claims
0Family size
Inventor
Key dates
| Filing date | Nov 10, 1981 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Nov 10, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G1/365
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This invention relates to new and useful improvements in a platform for stairs, and the principal object of the invention is to provide a device which may be effectively employed as a scaffold structure for stairs, or a step-up platform to reach portions of the ceiling and the walls of a room.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.