Method of authenticating an item
US9162513B2 · kind B2 · utility
4Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2013 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Jan 13, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2019/06225
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of authenticating an item with a security mark includes providing a substrate (100); printing the security mark on the substrate with invisible ultraviolet (UV) absorbing ink (102); applying a coating comprised of UV fluorescent varnish (104) over the security mark and substrate; illuminating an area comprising the security mark and coating with UV light; identifying a reduced fluorescence image of the security mark; comparing the reduced fluorescence image with the security mark; and authenticating the item if the reduced fluorescence image matches the security mark.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.