Security device
US9411074B2 · kind B2 · utility
1Cited by
4References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2010 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Jun 10, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D2035/34
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A security device is disclosed having a region of piezochromic material and an integrated relief structure. The security device is arranged such that when a stress is generated in the piezochromic material and relief structure, an optical effect is generated in the piezochromic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.