Method of saving power consumption in a battery-operated pager receiver
CA 2109170 C · Owner: Nec Corporation · Inventors: Yoshizawa, Shigeo; Koga, Kuniaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In orders to effectively reduce power consumption of a radio pager, an originally-determined pulse width at which power is supplied to high-power drain circuitry is narrowed in the case where the interval between two adjacent code signals transmitted from a calling station becomes less than a predetermined time duration. Conversely if the , above-mentioned interval exceeds the predetermined time duration the narrowed pulse width is changed to the original one.
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 25, 1993 and granted January 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2015.
- 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.