Wide aspect television receiver
CA 2133922 C · Owner: Shima, Juichi · Inventors: Shima, Juichi; Ishii, Yoshinori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wide aspect television receiver which corrects variations in the luminance between the center and peripheral portion of the screen, that occur due to changing vertical deflection widths by suppressing a video signal amplitude at the top or bottom of the screen to be smaller than that at the center of the screen, and also corrects over-correction of the lateral pincushion distortion.
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 October 20, 1994 and granted June 16, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 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.