Call routing based on prior telephone calls
CA 2227658 C · Owner: At&T Corp. · Inventors: Furman, Daniel Selig
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A call through a telecommunications network (10) that is dialed by a caller (12) to a lifetime number of a subscriber (14) that may be in common with the lifetime number of at least one other subscriber is routed in accordance with the past call history of one of the calling party and the subscribers with lifetime numbers common to the dialed number. The call from the caller is routed to that lifetimenumber subscriber to whom the caller has previously called on the basis that thecaller is more likely to want a connection with someone who the caller had previously called.
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 January 22, 1998 and granted April 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2020.
- 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.