Composite IC card
US4849614A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1986 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Dec 18, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q20/35765
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A composite IC card for controlling information of a plurality of different enterprises using an IC card in which a memory is divided into a plurality of storage areas and which has a code store section for storing a plurality of codes necessary to access the storage areas, a first code specify section for specifying a first code corresponding to each enterprise, a second code specify section for specifying a second code set according to the security level of each storage area, a code read section responsive to an instruction to access a desired storage areas from an external device for reading the first and second codes from the code store means, a code collate section for collating the externally inputted code with the code read by the code read section, and a section for allowing the access to the desired storage area thus instructed when all collations in the collate section result in a match.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.