Frame synchronization system among multiple radio base stations for tdma digital mobile communications system
CA 2033309 C · Owner: Kondo, Seiji · Inventors: Kondo, Seiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A TDMA digital mobile communications system prevents TDMA frame synchronization from being asynchronous among radio base stations when a communication held by a mobile station is handed over from one service area to another. A control station sends a reset pulse for TDMA frame synchronization to the radio base stations each being situated in a particular service area over communications cables. In response, the radio-base stations each generates a TDMA frame. The control station has a synchronous signal generator for generating the reset pulse while each radio base station has a time delay adjustment unit for adjusting the time delay of the reset pulse. The synchronous signal generator and …
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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 December 27, 1990 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 27, 2012.
- 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.