Contactless IC card communication system and related method
US6388562B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 12, 1999 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Jan 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10297
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A reader/writer (RW) requires identification of anti-collision techniques used by IC cards (A, B, C, and D). The IC cards implement answers to the anti-collision technique identification requirement by the reader/writer at different timings respectively for respective IC cards among the IC cards which use different anti-collision techniques respectively. The reader/writer requires identifications of types of the IC cards in dependence upon the anti-collision techniques in response to the answers by the IC cards. The IC cards return identification data thereof in response to the card type identification requirements by the reader/writer for respective IC cards among the IC cards which use different anti-collision techniques respectively. The reader/writer identifies the types of the IC cards in response to the identification data of the respective IC cards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.