A communications network and method for screening incoming circuit switched calls
CA 2330440 A1 · Owner: Sundell, Hans-Olof · Inventors: Sundell, Hans-Olof; Hall, Goran; Kannas, Chris
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A communications network (100) and method for screening incoming circuit switched calls (108) directed to a mobile terminal (116) operating in packet switched mode. The communications network (100) includes a circuit switched network (104) and a packet switched network (102). A called party uses the mobile terminal (116) to transmit to the packet switched network (102) a screening list (132) containing at least one listed phone number. The packet switched network (102) uses the screening list (132) to inform the called party whenever an incoming circuit switched call (108) of a calling party has a phone number matching anyone of the listed phone numbers.
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 April 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2021.
- 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.