Number portability using enhanced routing table
CA 2178860 C · Owner: Stentor Resource Centre Inc. · Inventors: Carkner, R. William; Williams, L. Lloyd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of providing number portability for the treatment of calls from a calling party to a specific number of a called party is disclosed. Once the dialed digits are received at a switching office serving the calling party, a determination is made of whether the call is directed to a portable number. In a first embodiment, if the call is directed to a portable number a TCAP query is launched from the originating office to an SCP. At the SCP, the dialed digits are translated to obtain new routing information. The new routing information, which is returned to the originating office is used to create an Initial Address Message (IAM) containing the calling and called party's numbers 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 June 12, 1996 and granted August 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2018.
- 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.