Authenticated cards
US6676021B1 · kind B1 · utility
22Cited by
7References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Oct 15, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/086
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An authenticated card (10) comprises a flat card body (12) being formed with at least one region thereon (14) being irreversibly transformable from a first state to a second state, the second state being identifiable by a card holder as different from the first state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.