Wireless terminal automatically alerting user upon wireless terminal entering a specified physical location
CA 2270324 C · Owner: Lucent Technologies Inc. · Inventors: Griffith, Gary L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Detecting a wireless terminal being taken from a facility. In a first embodiment, a base station is assigned to each exit from the facility. The base station uses a directional antenna which only communicates with wireless terminals within the exit area. When a wireless terminal enters the exit area and registers on the base station the base station, transmits the registration information to a wireless switching system that immediately places a telephone call to the user of the wireless terminal to inform them that they have not turned in their wireless terminal. Alternatively in a third embodiment, after the wireless terminal is registered, the base station rather than the wireless …
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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 28, 1999 and granted July 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 28, 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.