Memory device

Details Memory device Memory device

1984-04-18

1985-10-01

Rubinson, Gene Z.

Registers

Records

235375, 235380, G06K 1901

Patent

active

045448345

ABSTRACT:
A portable credit device for use in a credit control system has an electrochromic cell display, which contains a transition metal oxide that can color cathodically by reduction or anodically by oxidation. This enables a permanent, unpowered memory to be achieved. A credit control system is also disclosed in which the portable credit device can be used.

REFERENCES:
patent: 2950050 (1960-08-01), Mazer et al.
patent: 3647279 (1972-03-01), Sharpless et al.
patent: 3796999 (1974-03-01), Kahn
patent: 3978320 (1976-08-01), McBride, Jr.
patent: 4068213 (1978-01-01), Nakamura et al.
patent: 4240712 (1980-12-01), Thirant
patent: 4298793 (1981-11-01), Melis et al.
patent: 4396997 (1983-08-01), Kahn et al.
"Electronic Display", Matrix and Alphanumeric Devices, pp. 232-235, 1979, Sol Sherr.

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