Methods and apparatus for transmission of data
CA 2455022 A1 · Owner: Lemmons, Thomas · Inventors: Lemmons, Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A television program is transmitted on a first channel and enhancements to the program are broadcast on a second channel. The first channel comprises a video servicechannel. The second channel may comprise an out-of-bounds (OOB) channel, a non-servicechannel, or a non-utilized service channel. Enhancements may be extracted from videoinformation containing program content and enhancements. Channel, timing, and control information may be combined with enhancements prior to transmission. Combination may conform to extensions to the Advanced Television Enhancement Forum (ATVEF) specification. A receiver may store part of the enhancements and may render enhancements inresponse to …
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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 July 23, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2024.
- 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.