Heat-destructible magnetic memory element

Details Heat-destructible magnetic memory element Heat-destructible magnetic memory element

1981-05-15

1983-09-06

Rubinson, G. Z.

Registers

Records

Magnetic

235488, 235187, 235492, 365173, G06K 1906

Patent

active

044031386

ABSTRACT:
Magnetic memory element for transport ticket or credit card, comprising a support and at least one ferromagnetic layer containing at least one piece of information recorded therein and a layer of a non-magnetic diffuser in contact with the ferromagnetic layer to irreversibly destroy the magnetism of the ferromagnetic layer when the element is heated.

REFERENCES:
patent: Re28701 (1976-01-01), Edwards et al.
patent: 3480929 (1969-11-01), Bergman
patent: 4158434 (1979-06-01), Peterson

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