Method and apparatus to alternate stereoscopic images in a video display device
CA 2244635 C · Owner: Tetterington, Kenneth J. · Inventors: Tetterington, Kenneth J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus to cause a display device to display odd horizontal scan lines every second vertical refresh cycle while the even horizontal scan lines are not displayed and the display device to display even horizontal scan lines every other vertical refresh cycle while the odd horizontal scan lines are not displayed for use with stereoscopic systems.
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 August 7, 1998 and granted December 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.