Identification card including switching means for built-in batte

Details Identification card including switching means for built-in batte Identification card including switching means for built-in batte

1986-03-18

1987-09-08

Pitts, Harold I.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235487, 235442, G06K 500

Patent

active

046926011

ABSTRACT:
An identification card such as an IC card includes a built-in type battery, a central processing unit, a RAM, an FET switch and a latch circuit. An IC card production, the RAM is not energized by the battery when the FET switch is turned off in conjunction with the latch circuit. When the IC card is first used by an card issuer, the RAM is energized by turning on the FET switch in conjunction with the latch circuit.

REFERENCES:
patent: 3971916 (1976-07-01), Moreno
patent: 4105156 (1978-08-01), Dethloff
patent: 4592880 (1985-07-01), Chaum

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