Data control devices

Details Data control devices Data control devices

1975-02-20

1976-08-31

Cook, Daryl W.

Registers

Calculators

Input-output calculator to indicator, printer, etc.

235 6112N, 340173LS, 360 2, G06K 1904, G06K 1906, G11B 2504

Patent

active

039783200

ABSTRACT:
A portable plastic card is assigned to carry relevant inventory and other data for each of a given number of items. The card both stores and displays sufficient data to make it useful as an inventory control tool. The visual data is a persistent electrochromic display that shows select portions of the data stored in the magnetic track. Two edges of the card are tapered to prevent their improper introduction to a card reader. A diagrammatic drawing shows the preferred use of the card in a slip-issuing mode.

REFERENCES:
patent: 3702464 (1972-11-01), Castrucci
patent: 3760162 (1973-09-01), Holter
patent: 3840288 (1974-10-01), Schnatterly
patent: 3862716 (1975-01-01), Black et al.

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