Radio channel initial transmission scheme for mobile communication system
CA 2210179 C · Owner: Nakano, Etsuhiro · Inventors: Nakamura, Takehiro; Nakano, Etsuhiro; Hagiwara, Jyunichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radio channel initial transmission scheme for a mobile communication system which is capable of reducing an unnecessary interference with respect to the other radio channels as well as an unnecessary consumption of a battery of a mobile station. In the present invention this is realized by not carrying out a transmission of the unnecessary general information during an initial period of a radio channel set up. More specifically only the constantly necessary information among radio channel transmission signals is initially transmitted from a transmitting side of the base station and the mobile station at a time of setting up a radio channel between the base station and the mobile station …
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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 July 10, 1997 and granted September 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 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.