Comparing patterns
CA 2479223 C · Owner: British Telecommunications Public Limited Company · Inventors: Stentiford, Frederick Warwick Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A first image (or other pattern) is represented by a first ordered set of elements A each having a value and a second pattern is represented by a second such set. A comparison of the two involves performing for each of a plurality , of elements x of the first ordered set the steps of selecting (103) from the first ordered set a plurality of elements x' in the vicinity of the element x under consideration, selecting (102) an element y of the second ordered set and comparing the elements x' of the first ordered set with elements y' of the second ordered set (each of which has the same position relative to the selected element y' of the second ordered set as a respective one x' of the …
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 21, 2003 and granted September 4, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 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.