Illuminated sign box
US4864756A · kind A · utility
7Cited by
13References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1987 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Dec 21, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2013/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sign box has a translucent front panel of flexible material which is attached to the longitudinal edges of a reflector of channel-shape, and which is stretched and tensioned by forcing the longitudinal edges of the reflector away from each other by means of reaction members contained within the reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.