Methods for securing invisible 2D barcodes and printed images
US9747483B2 · kind B2 · utility
0Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2015 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Dec 21, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/06056
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A secure document includes a fluorescent barcode and a fluorescent filler printed onto a substrate. The fluorescent barcode is printed using a first fluorescent ink of a first color and the fluorescent filler is printed using a second fluorescent ink of a second color that is different than the first color. In order to read the fluorescent barcode, the secure document must be illuminated with ultraviolet and/or infrared light. Then, a color filter must be used to filter the fluorescent filler out, leaving the fluorescent barcode visible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.