Counterfeit stb prevention through protocol switching
CA 2428830 A1 · Owner: Qu, Tony · Inventors: Qu, Tony; Hoang, Khoi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention teaches a universal STB operative to prevent unauthorized access to digital broadcast data including a databus (622); a first communication device (602) suitable for coupling to a digital broadcast communications medium, the first communication device operable to receive digital broadcast data; memory (608) bi-directionally coupled to the databus the memory including computer executable instructions for: a) determining whether the STB is authentic or counterfeit; b) performing anti-counterfeit measures upon the STB when the device is determined to be counterfeit; and c) updating a communications protocol of the STB when the STB is determined to be authentic; a …
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 June 27, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2023.
- 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.