Double sided printed security document
US7883762B2 · kind B2 · utility
3Cited by
13References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 18, 2003 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Feb 16, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24802
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The invention concerns a security document comprising, as security element against recto/verso copying, indicia present on both sides and capable of being viewed under reflected lighting and forming an image capable of being viewed under transmitted light. The invention is characterized in that said indicia comprise lines and form said image with 3D effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.