Electronic identification system employing a data bearing identi

Details Electronic identification system employing a data bearing identi Electronic identification system employing a data bearing identi

1974-12-16

1976-11-30

Yusko, Donald J.

Communications: electrical

Digital comparator systems

221 2, 49 35, H04Q 900, E05B 6500, G06F 1100

Patent

active

RE0290572

ABSTRACT:
An electronically alterable data card, identification card, and card decoder and encoder circuitry utilizing keyboard data input, data scrambling circuitry and data comparison on circuitry for validation and access purposes.

REFERENCES:
patent: 2315741 (1943-04-01), Shafer et al.
patent: 2714201 (1955-07-01), Whitehead
patent: 2754496 (1956-07-01), Embry et al.
patent: 2842876 (1958-07-01), Chicoine et al.
patent: 2914746 (1959-11-01), James
patent: 2995730 (1961-08-01), Marcellus
patent: 3015087 (1961-12-01), O'Gorman

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