Method for rerouting intra-office digital telecommunications signals
CA 2309012 C · Owner: Lystad, Gerald D. · Inventors: Channell, Leigh B.; Lystad, Gerald D.; Blenis, James H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of rerouting a digital infra-office signal through a telephone central office comprises the steps of retrieving identification data for ports of first and second digital access and cross-connect systems the ports being connected by an infra-office digital trunk retrieving identification data for an alternative path from the first cross- connect system to the second cross-connect system correlating identification data for the alternative path to the identification data for the infra-office digital trunk determining availability of and displaying alternative path data responsive to entry of identification data for the infra- office digital trunk and rerouting the infra-office digital …
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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 May 23, 2000 and granted September 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 23, 2022.
- 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.