Counterfeit detection of an optically active article using security elements
US11132554B2 · kind B2 · utility
1Cited by
17References
18Claims
0Family size
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Key dates
| Filing date | May 12, 2017 |
| Grant date | Sep 28, 2021 |
| Priority date | — |
| Expiry date | Sep 11, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2003/0276
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In some examples, an optically active article includes a retroreflective substrate; and at least one security element disposed at the retroreflective substrate; an article message disposed at the retroreflective substrate, and wherein the at least one security element comprises validation information that is detectable outside a visible light spectrum, and wherein a combination of the article message and the validation information of the at least one security element indicates whether the optically active article is counterfeit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.