Combination of vcr index and epg
CA 2536718 C · Owner: Leung, Elsie Y. · Inventors: Mankovitz, Roy J.; Kwoh, Daniel S.; Leung, Elsie Y.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An interactive television guide system that makes available program listings for broadcast programs and recorded programs. The system comprises a screen for displaying an on-screen guide comprising at least two program listings wherein a first program listing corresponds to a recorded program and a second program listing corresponds to a broadcast program. A controller for receiving a user selection of a program listing displayed in the on-screen guide is provided. In response to a user selection the program that corresponds to the selected program listing is displayed.
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 March 14, 1997 and granted September 25, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2019.
- 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.