Power-saving method and circuit
CA 2199441 C · Owner: Nec Corporation · Inventors: Fujimoto, Shigeru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a communication network including a plurality of stations each having a transceiver, the transceiver includes transmission and reception detectors and a power controller. The power controller powers off the transceiver except the transmission and reception detectors and powers on and off the transmission and reception detectors intermittently in a wait state where neither transmission nor reception is detected. In a communication state where transmission or reception is detected, the power controller powers on the transceiver.
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 March 7, 1997 and granted November 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 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.