System and method for authentication of goods
CA 2304632 A1 · Owner: Durst, David I. · Inventors: Kaish, Norman; Fraser, Jay; Durst, David I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An authentication system comprising a medium (2) having a plurality of elements (3), the elements being distinctive detectable and disposed in an , irregular pattern or having an intrinsic irregularity. Each element is characterized by a determinable attribute distinct from a two-dimensional coordinate representation (4) of simple optical absorption or simple optical reflection intensity. An attribute and position of the plurality of elements with respect to a position reference, is detected. A processor generates an encrypted message (8-10) including at least a portion of the attribute and position of the plurality of elements. The encrypted message is recorded in physical …
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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 September 29, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 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.