Detection of counterfeit articles
CA 2177368 A1 · Owner: Beale, Marc Ivor John · Inventors: Beale, Marc Ivor John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a means of invisibly marking articles for identification and authentication purposes especially in the retail, trade. Articles or their packaging, are labelled with a mark which is only discernible as such with the aid of suitable infrared imaging equipment. A preferred embodiment exploits the sensitivity of a standard silicon charge coupled device television camera to provide a cheap readily available system which can be small enough to be used covertly. An optical filter is used to prevent visible light from entering the camera whilst allowing infrared radiation to pass and a tungsten lamp with a similar second optical filter is used to provide a covert source of …
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 November 24, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 2016.
- 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.