Generating a non-reproducible printed image
CA 2402603 C · Owner: Dexrad (Pty) Ltd. · Inventors: Tame, Gavin Randall
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of generating a non-reproducable printed image for example on a , cheque, involves printing a first background layer of ink on the document and then printing data on top of the background layer. The ink used to print the background layer is reflective of light of a predetermined wavelength typically in the infra red spectrum. The ink used to print the data is visually indistinguishable from the first ink but absorbs light in the infra , red spectrum so that when the printed image is illuminated with infra red light, the image can be discerned. The image typically comprises an encrypted symbolic image and is used for security purposes.
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 March 14, 2001 and granted February 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 14, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2023.
- 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.