Call routing using direct in-dialing numbers in place of temporary routing numbers
CA 2333141 A1 · Owner: Wikstrom, Claes · Inventors: Lindgren, Magnus; Wikstrom, Claes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A call routing number for a mobile station (MS1) operating in a wireless telecommunication system is obtained by first requesting (51) a temporary routing number for use in routing a call to the mobile station. Provided in response (53) to the request is a routing number (DID) that had already been assigned to the mobile station when the request was received (93 97).
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 June 4, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 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.