Seat having an adjustable backrest
US4425910A · kind A · utility
11Cited by
3References
10Claims
0Family size
Inventor
Key dates
| Filing date | Nov 27, 1981 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Nov 27, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C7/462
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The seat has a backrest with an adjustable vertebral support comprising two separate adjusting elements which act against the rear of the backrest cushion to vary the curvature and spinal support effect thereof, at two different levels in the heightwise direction of the backrest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.