Image display apparatus
CA 2041354 C · Owner: Yoshida, Chisato · Inventors: Yoshida, Chisato
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An image display apparatus includes an automatic pedestal processing circuit for detecting the minimum signal level of the input video signal for controlling the signal level of the video signal on the basis of results of detection. A control section is provided for activating the automatic pedestal processing circuit during the effective display period for the input video signals to prevent malfunction of the automatic pedestal processing section to display an image with superior picture quality.
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 April 26, 1991 and granted January 2, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2013.
- 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.