Enabling blind person to distinguish colors
CA 2509250 A1 · Owner: Tenebraex Corporation · Inventors: Jones, Peter W. J.; Purcell, Dennis W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Systems and methods for processing data representative of a full color image. Such systems may comprise the steps of assisting a color blind person to indicate portions of an image which to their color-deficient vision are indistinguishable, and altering the image by transparent minus-red electronic filter elements (6) laid down on a transparent field (8) to cause those portions to become distinguishable and identifiable.
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 3, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 3, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 2025.
- 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.