Intelligent transceiving method, device and system
CA 2393630 C · Owner: Maruo, Jun · Inventors: Maruo, Jun; Kagami, Atsushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method thereof for communicating a scramble key (for descrambling scrambled digital signals) and service information (used in an electronic programming guide) to an intelligent transceiver (e.g. a set-top box) (450a, b, c, d, e) using a bi-directional digital broadcast system (400). The intelligent transceiver (450a, b, c d, e) includes an in-band tuner , adapted to receive from the digital broadcast system (400) in-band digital signals comprising audio content and video content. The intelligent transceiver (450a, b, c, d, e) also includes a second tuner adapted to send and receive a scramble key over the World Wide Web via a cable modem. In one embodiment, the …
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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 December 19, 2000 and granted April 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2022.
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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.