Optical disc authentication and data storage
CA 2311764 A1 · Owner: Lackritz, Hilary S.. · Inventors: Lackritz, Hilary S..; Mclaughlin, Mark; Merry, J. Bradford
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compact data storage device (12) having the approximate dimensions of a credit card that is capable of storing large amounts of data (e.g. 50-100 Megabytes). Moreover, the device (12) may encode data in both a linear magnetic stripe fashion so that the data can be read by typical card swipe data reading devices (e.g. magnetic card swipe devices) as well as optical disc readers that typically read tracks of spirally encoded optical data (40). Additionally, a method for purposefully manufacturing defects into optical discs for authenticating the manufactured optical discs.
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
- Filed October 28, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2020.
- 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.