Expired Canadian patentCanada
Image encoding system based upon boundary strength
CA 2989883 C · Owner: Dolby International Ab · Inventors: Sun, Shijun; Katata, Hiroyuki; Lei, Shawmin
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Adjacent regions are identified in an image. Coding parameters for the adjacent regions are identified. Selective filtering is performed at the region between the identified adjacent regions.
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 September 11, 2002 and granted May 22, 2018. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 11, 2002
GrantedMay 22, 2018
Term endedSeptember 11, 2022
Patent numberCA 2989883 C
Classification (IPC)H04N19/82
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.