Portable card incorporating magnetic bubble elements

Details Portable card incorporating magnetic bubble elements Portable card incorporating magnetic bubble elements

1979-11-01

1982-01-12

Stellar, George G.

Static information storage and retrieval

Magnetic bubbles

365 2, G11C 700, G11C 1908

Patent

active

043108970

ABSTRACT:
A portable credit or identity card or the like incorporates magnetic bubble elements. The bubble elements comprise a layer of magnetic material capable of containing magnetic bubbles and which is provided with a propagation track and a means for detecting the bubbles. Two flat permanent magnets arranged on either side of the magnetic layer generate a magnetic polarizing field perpendicular to the layer. The bubble element forms the memory which contains the identity code for the card.

REFERENCES:
patent: 3786445 (1974-01-01), Ho et al.
patent: 3864671 (1975-02-01), Myer
patent: 4156934 (1979-05-01), Burford et al.

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