Service transfer to a wireless telephone
CA 2202000 C · Owner: At&T Wireless Services, Inc. · Inventors: Buhrmann, Michael; Amin, Umesh J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a wireless communication network, a feature initiation signal is received from a first wireless telephone, a data record for a second telephone is updated and calls placed to, the second telephone are routed to the first wireless telephone based on the updated data record. The first wireless telephone may be a mobile telephone in a vehicle and a, registration signal generated by the mobile telephone upon provision of power thereto may serve as the feature initiation signal. The second telephone may also be a wireless telephone such as a portable telephone. When an outgoing call code is received from the first wireless telephone, the network places the outgoing call in accordance with 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 April 7, 1997 and granted March 6, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 7, 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.