Security documents and a method and apparatus for printing and authenticating such documents
US7367593B2 · kind B2 · utility
8Cited by
9References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2002 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Jun 12, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D2035/16
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A security document and a method of making and authenticating the document in which the document contains a security feature of an image/background pattern printed in one subtractive color on the document and at least one other but different image/background pattern printed in another subtractive color superimposed directly over the one image/background pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.