Magnetic recording medium having authenticating poles at its edg

Details Magnetic recording medium having authenticating poles at its edg Magnetic recording medium having authenticating poles at its edg

1992-01-07

1992-11-03

Shepperd, John W.

Registers

Coded record sensors

Particular sensor structure

235494, G06K 708, G06K 1906

Patent

active

051608332

ABSTRACT:
A magnetic recording medium includes a truth determining code for determining whether the medium is authentic. The truth determining code is indicated by a magnetic polarity at at least an edge of the medium. A method of determining whether the medium is authentic comprises the steps of detecting a magnetic polarity at an edge of the magnetic recording medium, and collating a combination of the magnetic polarity with a proper combination of the magnetic polarity.

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