Magnetic digital display sign
US4507888A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1983 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | May 12, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sign for displaying information including numerals, having a background member including ferromagnetic material and a plurality of substantially similar individual character elements which may be magnetically attached to the background member to cooperatively form individual digits. Seven or fewer individual character elements, each preferably having the identical elongated hexagonal shape, are combined to form each digit of a price being advertised. Each such character element is made of flexible sheet material including comminuted permanently magnetized material, and an outer surface of each character element may be coated with light-reflective or fluorescent paint of a color contrasting with the color of the background member. Alternative labels may be magnetically mounted on the background member to identify the product for which the price is advertised.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.