Hybrid security device for security document or token
US10046589B2 · kind B2 · utility
1Cited by
12References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2015 |
| Grant date | Aug 14, 2018 |
| Priority date | — |
| Expiry date | Apr 22, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/2059
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A hybrid security device for security documents and the like, with the microstructure for a first optically variable device (OVD) and the microstructure for a second OVD mutually interlace or interspersed. The first microstructure has a height profile that differs from that of the second microstructure by more than 0.5 microns. Suitable fabrication processes for the hybrid security device are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.