Xds enhancement system
CA 2258433 A1 · Owner: Fang, James · Inventors: Fang, James; Blankenburg, Carl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A television system and method for facilitating use of closed caption text or other, information that may be included in an extended data service (XDS) system. The system, includes a tuner adapted to receive a television signal the television signal , including a, video signal and an XDS signal and a television display for displaying a video image, corresponding to the video signal. A data slicer coupled to the tuner extracts the XDS, signal from the television signal and sends the XDS signal out a data port to a peripheral, device, such as a text display. The text display may be used to display text information, included in the XDS signal such as closed caption and/or other …
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 January 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 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.