Method and apparatus for signal transmission in cdma mobile communication system
CA 2207645 C · Owner: Ohno, Kouji · Inventors: Onoe, Seizo; Nakamura, Takehiro; Ohno, Kouji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus for signal transmission in a CDMA mobile communication system which is capable of preventing an unnecessary increase of an amount of interference power due to the signal transmission through a radio channel and thereby preventing an unnecessary decrease of a system capacity. The radio channel transmission signals are transmitted through the radio channel where the radio channel transmission signals contain the transmission signals which are formed by control signals or user signals and necessary signals which are necessary in maintaining the radio channel and this radio channel transmission is controlled so that only signal portions for the necessary signals are …
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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 June 12, 1997 and granted February 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 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.