Debit card
CA 1237814 A · Owner: Drexler Technology Corporation · Inventors: Pierce, Gerald A.; Myers, Gregory K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Debit Card, 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 …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.