Channel selection method
CA 2336550 C · Owner: Nec Corporation · Inventors: Osawa, Tomoki; Ishii, Kenichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A channel selection method is provided to share a frequency band efficiently in local radio communication system and other radio communications systems. The use of each selectable channel in local radio communications system 10A is examined on the basis of transmission and reception of control packets (step 302). The use of each selectable channel in another radio communication system 10B is examined on the basis of interference wave power (step 303). A channel for use in a radio communication at local radio communication system 10A is selected based on the results of the examinations.
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 July 2, 1999 and granted November 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 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.