Security device and method
US8141908B2 · kind B2 · utility
4Cited by
5References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2008 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Nov 26, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/56
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A security device comprises a substrate having a viewing region. A first pattern of a first color and a second pattern of a second color are printed on one side of the viewing region. A third pattern of the first color and a fourth pattern of the second color are printed on the other side of the viewing region. The first and second patterns on the one side of the viewing region overlap the fourth and third patterns respectively on the other side of the viewing region whereby
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.