Message frame
US5077925A · kind A · utility
28Cited by
7References
1Claims
0Family size
Inventors
Key dates
| Filing date | Apr 23, 1990 |
| Grant date | Jan 7, 1992 |
| Priority date | — |
| Expiry date | Apr 23, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F21/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A frame is disclosed herein having an elongated base with opposite side rails defining an exposed message area therebetween occupied by a resilient pad. A message sheet is placed between the pad and a transparent window or layer which is slidably carried on the side rails to cover and protect the message sheet. Stop abutments are provided to limit sliding of the window and a snap-lock mechanism is employed for releasably retaining the window in place over the message sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.