System for distributing video programming
CA 2058113 C · Owner: Ullrich, Kathryn E. · Inventors: Walker, Stephen S.; Ullrich, Kathryn E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
System for distributing video programs includes a transmission system having a plurality of channels includes a stored database (20) representing a predetermined schedule including timing instructions. Video server 11 contains a computer is programmed to provide real time outputs in response to the database time instructions. A bus has an input coupled to the computer and provides control signals in response to the real time outputs. A recorded medium contains a program in television format. A plurality of video players are used for playing the recorded media, each video player having a control port coupled to the bus and responsive to the control signals. Each video player has an output …
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 December 19, 1991 and granted April 20, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 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.