Method of accessing a mobile radio land system from one of a number mobile stations
CA 2060428 A1 · Owner: Mueller, Walter G. A. · Inventors: Dahlin, Jan-Erik A. S.; Mueller, Walter G. A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of accessing a base station from a mobile station in a mobile radio system, in which the mobile station communicates with the base station in one or more time slots included in a frame according to the TDMA-principle. In one time slot there, are reserved fields for control information (SACCH DVCC) which, however, are not used in the uplink and the downlink communication if the time slot represents a digital control channel. According to the invention these fields are used by a mobile, station (MS1) to transmit control information (R) to the base station (B1) which indicates the time slot order number and how many such time slots which are to be reserved by the base station in order …
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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 January 31, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 31, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2014.
- 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
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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.