Intelligent-networked telephone system with call waiting services compatibility
CA 2312152 A1 · Owner: Briggs, Barry Ward · Inventors: Hua, Shiyan; Briggs, Barry Ward; Huen, Wing Hing
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A public switched telephone system with an intelligent network (IN) for automated , call processing is compatible with Call Waiting service. Unlike prior art systems, in which a customer placing a call handled by an IN must disable Call Waiting service, during an entire transaction (initial call placement connection to the , destination and, conversation until the parties "hang up") to avoid non-processing or misprocessing by, the IN, a customer using the present invention need only disable Call Waiting when, communicating with an Intelligent Peripheral during the initial call placement. The, system automatically restores Call Waiting after the call has been routed so that the, …
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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 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 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.