Signal switching
CA 2383898 C · Owner: Hoy, Nigel · Inventors: Hoy, Nigel; Rayner, Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A television or other signal is received via main and duplicate feeds (11 12) , into buffers (22, 42). Should the main feed suffer interruption or disturbance the output (13) is switched at (16) over to the duplicate feed but in a , staged process. Upon initial detection of disturbances read-out from the main buffer (22) is performed using locally generated timing signals in lieu of timing signals obtained from the incoming signal. If however the disturbances persist the two buffers are synchronised and switchover performed.
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 30, 2000 and granted May 15, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 2022.
- 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.