Laser marking process on retro-reflective material for security labels
US6217175A · kind A · utility
9Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1998 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Jun 26, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A simplified method and apparatus for creating counterfeit-resistant labels is described. A laser is used to mark a retro-reflective material such that light only from specific directions are reflected back towards the source. During authentication of the labels, the label is tilted to verify that only light from the specific directions are reflected back towards the source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.