Home entertainment system and method of its operation
CA 2318844 A1 · Owner: Shalkey, Eric · Inventors: Shalkey, Eric; Ward, Thomas Edward Iii; Yuen, Henry C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An EPG database for a home entertainment system includes files that contain information about television programs retrievable by time and channel. The files are linked to each other so information about a future television program can be obtained by accessing a file about a current television program. A current television program displayed on the screen (20) of a home entertainment system includes an announcement or advertisement (56) of a future television program. The availability of an electronic program guide function (54) is signaled during, before or after the announcement. A command , is issued to invoke the EPG function (54). The information about the future television …
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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 January 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 23, 2021.
- 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.