04598196 is referenced by 37 patents and cites 6 patents.

An optical information-bearing debit card having servo tracks and calibration works on a recording medium for aligning a reading or writing light beam with a nearby value site area. The medium is an elongated strip of reflective information storage material adhered to a self-supporting card, like a credit card. The value site area may be decremented by the light beam changing the optical characteristics of the recording medium. The servo tracks are lengthwise, parallel to the long dimension of the strip of recording material while the calibration marks are non-continuous marks, aligned in a track parallel to the servo tracks. Tracks and calibration marks are disposed on the card so that the value area can be read bidirectionally starting from either end of the card.

Title
Debit card
Application Number
6/629368
Publication Number
4598196
Application Date
July 10, 1984
Publication Date
July 1, 1986
Inventor
Gregory K Myers
San Francisco
CA, US
Gerald A Pierce
Redwood City
CA, US
Assignee
Drexler Technology Corporation
CA, US
IPC
G06K 7/10
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