Time-based paging for mobile telephone units
CA 2219839 C · Owner: Lucent Technologies Inc. · Inventors: Hanson, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arrangement for paging mobile telephone units (MTU) in a cellular mobile system that conserves paging resources. If the elapsed time since the most recent registration of an MTU is small, then an initial page covering only the cell of the most recent cell location for the target MTU, and the neighboring cells for that cell, is used. Advantageously, since the likelihood that the MTU is still within that cell or its neighbors is high, so that paging resources are conserved by paging in only a small number of cells.
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 October 31, 1997 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 31, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 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.