Manually codeable cards for card readers

Details Manually codeable cards for card readers Manually codeable cards for card readers

1987-07-24

1989-06-06

Leung, Philip H.

Registers

Records

Laminated

235489, 235494, G06K 2100

Patent

active

048374270

ABSTRACT:
A kind of manually codeable card for card readers composed of an upper and a lower sheet of transparent material glued together, the lower sheet printed with black ink all over except a plurality of transparent circles which can be sticked on to become opaque with black circles from a paper with transposable black circles or round opaque stickers. The coded number of the card is represented by the different combination of transparent and opaque circles.

REFERENCES:
patent: 2350382 (1944-06-01), Angel
patent: 3248808 (1966-05-01), Daker et al.
patent: 3359656 (1967-12-01), Seekins
patent: 3435192 (1969-03-01), Hartney
patent: 3829662 (1974-08-01), Furahashi
patent: 4085314 (1978-04-01), Schultz et al.
patent: 4092526 (1978-05-01), Beck

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