Prepaid or stored-value card with means for preventing useful fr

Details Prepaid or stored-value card with means for preventing useful fr Prepaid or stored-value card with means for preventing useful fr

1998-02-02

2000-04-04

Lee, Michael G

Registers

Records

Conductive

902 26, 235379, G06K 1906

Patent

active

060450509

ABSTRACT:
A prepaid card with elements for preventing useful fraudulent alteration, comprising, on a supporting element, at least one electrically rewritable permanent register, at least one temporary register and at least one control element for comparison between a usable value that is present in the at least one permanent register and a new value which is temporarily provided in the at least one temporary register. The control element is suitable to allow to write the new value in the permanent register in replacement of the usable value only if the new value is smaller than the usable value.

REFERENCES:
patent: 3653480 (1972-04-01), Yamamoto et al.
patent: 4780602 (1988-10-01), Kawana et al.
patent: 5030806 (1991-07-01), Collin
patent: 5216419 (1993-06-01), Fujisaka et al.
patent: 5504701 (1996-04-01), Takahashi et al.
patent: 5521362 (1996-05-01), Powers
patent: 5536923 (1996-07-01), Foglino
patent: 5811771 (1998-09-01), Dethloff
patent: 5884292 (1999-03-01), Baker et al.
patent: 5889266 (1999-03-01), Schrenk

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