System and process for return channel spectrum manager
CA 2408496 A1 · Owner: Nikolich, Paul E. · Inventors: Nikolich, Paul E.; Unger, J. David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The scanning receiver spectrum analyzer system is a system for monitoring the spectrum of RF energy on the upstream cable plant for the purpose of operating a group of cable modems in frequency bands that are the most interferencefree. The spectrum analyzer surveys the entire upstream spectrum (typically 5 - 42 MHz) to determine the noise level at each frequency and then weighing , this data with current operating conditions (e.g. bit error rates) to determine the best possible alternative channel frequency for modems on an upstream node, and then waiting for a trigger condition to occur which indicates a need for the modems to change frequency.
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 May 10, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 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.