Receiver with correction for comb filter frequency response
CA 2010665 C · Owner: Thomson Consumer Electronics, Inc. · Inventors: Sendelweck, Gene Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A video source is coupled to a display processor by a circuit path including a comb filter and a luminance signal delay line and including a comb filter amplitude correction circuit. Circuit means in the path prevents impedance variations of the correction circuit from causing reflections in the delay line thereby preventing image blur due to such reflections. In a preferred embodiment this feature is provided using existing receiver circuitry thereby providing the further technical and economic advantage of improved reliability and providing a cost reduction.
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 February 22, 1990 and granted March 14, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 22, 2012.
- 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.