Memory card with a protective layer on the metal electrical cont

Details Memory card with a protective layer on the metal electrical cont Memory card with a protective layer on the metal electrical cont

1995-06-22

1997-06-03

Hajec, Donald T.

Registers

Records

Conductive

439520, G06K 19067

Patent

active

056357028

ABSTRACT:
A card comprising an electronic module having a memory, into which a designated number of consumable units has been stored, and a metal electrical contact zone. At least one part of the contact zone is covered with a layer of readily removable material which is applied before the card is delivered to points of sale. This material must be removed to enable the card to be read. Once having been removed, the material indicates that the card has been used so that consumer fraud can be prevented in terms of the number of consumable units retained in the memory.

REFERENCES:
patent: 3655456 (1972-04-01), Hamel
patent: 4738473 (1988-04-01), Meloni et al.
patent: 4774399 (1988-09-01), Fujita et al.
patent: 4780604 (1988-10-01), Hasegawa et al.
patent: 4780793 (1988-10-01), Ohtsuki
patent: 4889498 (1989-12-01), Mizuta
patent: 5475205 (1995-12-01), Behm et al.
Patent Abstracts of Japan, vol. 10, no. 354 (P-521), 28 Nov. 1986, and JP-A-61 151 791 (Hitachi Ltd.) 10 Jul., 1986.

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