Registers – Records – Conductive
Patent
1992-01-07
1993-11-23
LaRoche, Eugene R.
Registers
Records
Conductive
235379, 235380, G06K 500
Patent
active
052646890
ABSTRACT:
The disclosure concerns memory cards and, more particularly, cards that are used as means of prepayment in installations for the dispensing of products and services. It is proposed to make the memory rechargeable by means of a credit counter, incrementable from outside the card, and a comparator which compares the content of this counter with that of a page counter. The page counter records the number of pages of P accounting units already used up. A no more credit signal is emitted on an external terminal when the content of the page counter reaches the content of the credit counter. A security system against the fraudulent recharging of the card is set up by an algorithm bringing into play the content of the credit counter and an identification number contained in the card.
REFERENCES:
patent: 4204113 (1980-05-01), Giraud et al.
patent: 4367402 (1983-01-01), Giraud et al.
patent: 4501958 (1985-02-01), Glize et al.
patent: 4822984 (1989-04-01), Remery et al.
patent: 4864110 (1989-09-01), Guillou
patent: 4908499 (1990-03-01), Guion
Depret Eric
Hiolle Philippe
Maes Philippe
France Telecom
Gemplus Card International
Glembocki Christopher R.
La Poste
LaRoche Eugene R.
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