Method and device for the management of transactions using microchip cards
US5227612A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Jan 28, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/1025
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The method for the management of transactions in a system including card readers and the associated microcircuit cards consists in organizing the memory of the cards, designed for the recording of the transactions, in two zones, one zone that is accessible through the presenting of the bearer code at each transaction, for the transactions involving sums above a predetermined value, the other zone being accessible for the transactions involving sums that are below the predetermined value, without any systematic presenting of the bearer's code: a presenting of the bearer's code commands the writing of opening bits of recording spaces in this second zone until the number of open spaces is equal to N which is a predetermined value. The disclosed method can be applied, notably, to credit cards, telephone cards and multiple-use cards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.