Mobile communication system
CA 2206844 C · Owner: Okajima, Ichiro · Inventors: Maebara, Akihiro; Kobayashi, Katsumi; Okajima, Ichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Base station generates a mobile station identifier which indicates a mobile station that a data signal is addressed thereto and a head slot having a data , signal when there is a data signal that has a length to be able to transmitted using one slot of a, TDMA radio channel. When there is a data signal that has a length to be not able to, transmitted using one slot, base station generates a head slot and continuous slots which, contain at least a part of data signal. Base station transmits the head slot by using the, starting slot which located at predetermined position every mobile station on the TDMA, radio channel, and transmits the continuous slots by using slots which follow the, …
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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 March 12, 1997 and granted January 15, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 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.