Security printing using a diffraction grating
US8015919B2 · kind B2 · utility
6Cited by
34References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2004 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | May 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2270/23
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is provided an apparatus and a method of printing a diffraction grating. In particular, the present invention relates to diffraction gratings applied to a substrate (1), such as a hologram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.