Security label
US5651615A · kind A · utility
18Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1995 |
| Grant date | Jul 29, 1997 |
| Priority date | — |
| Expiry date | Apr 12, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F3/0294
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A security device for identifying products includes a printing medium in which luminescent agents are dispersed and having at least one opaque part disposed on at least one luminescent part of the medium. The opaque part is the same color as the luminescent part and has at least one contour of a different color. When illuminated by predetermined radiation in the non-visible spectrum, the device shows an image different than that observed in ordinary light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.