Expired Canadian patentCanada
Picture-in-picture circuitry using field rate synchronization
CA 2010664 C · Owner: Duffield, David Jay · Inventors: Canfield, Barth Alan; Duffield, David Jay
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A picture-in-picture system including panning and scrolling capability moves an inset image about a display in synchronism with the vertical field rate in order to provide smooth movement from one display position to another.
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 21, 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.
FiledFebruary 22, 1990
GrantedMarch 21, 2000
Term endedFebruary 22, 2010
Patent numberCA 2010664 C
Classification (IPC)H04N5/45
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.