Location-dependent call forwarding
CA 2271801 A1 · Owner: Alperovich, Vladimir · Inventors: Valentine, Eric; Alperovich, Vladimir
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved cellular communications system and method is disclosed which routes incoming calls to those subscribers who do not answer their page. The incoming call is routed to one of a list of alternate numbers such as a home , or work number in a public telephone system. Based upon the last known location of the subscriber within the cellular system a particular list of , such alternate numbers are tried in an effort to contact the subscriber outside the cellular network. Different lists are utilized depending upon the subscriber's last known location. In a first embodiment of the present invention, the various lists are stored in a home location register (26) for the cellular …
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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 November 18, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 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.