Optimized routing of calls to roaming subscribers within a telecommunications network
CA 2266019 A1 · Owner: Alperovich, Vladimir · Inventors: Alperovich, Vladimir
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A calling party subscriber informs the serving telecommunications node (70a 210) that the dialed called party number represents a mobile number. The serving telecommunications node then interrogates the home location register (HLR) (50) associated with the called party mobile station (10) to determine the current location of the called party mobile station. Upon determining the mobile switching center (MSC) (70b) currently serving the called party mobile station, the serving telecommunications node then directly establishes a call connection (170) with the serving MSC. The serving MSC then establishes a speech connection (120) over a radio channel with the called party mobile …
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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 September 15, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 15, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 15, 2019.
- 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.