Method and device for making documents secure using unique imprint derived from unique marking variations
US8345315B2 · kind B2 · utility
21Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2007 |
| Grant date | Jan 1, 2013 |
| Priority date | — |
| Expiry date | Jun 1, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/902
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The document identification method includes:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.