Apparatus for reading and identifying a data carrier in card form which has printing thereon
US5914482A · kind A · utility
2Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1997 |
| Grant date | Jun 22, 1999 |
| Priority date | — |
| Expiry date | Apr 4, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/06046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention concerns a card-shaped data carrier comprising a card body which has an inner electronic module for contactless communication with a coding and/or reading device and an external heat sensitive layer for the visually readable display of data stored in the electronic module as a result of thermal impact. The heat sensitive layer is designed to be reversible such that marks can be inscribed in a first temperature range and existing marks can be deleted in a second temperature range. The heat-sensitive layer is disposed on the card body in at least one sub-area thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.