Methods for identification and verification
US6501825B2 · kind B2 · utility
39Cited by
31References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2001 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Jan 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/076
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Secure documents and methods and apparatus for making the same. The documents are made secure using apparatus and methods in which one or more taggants are placed in the paper or ink of the document. The present or absence of the taggant within the document is detected by x-ray fluorescence analysis, thereby identifying or verifying the document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.