Cellular system architectures supporting data services
CA 2286466 C · Owner: Treventi, Philip Andrew · Inventors: Ejzak, Richard Paul; Treventi, Philip Andrew; Nanda, Sanjiv
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a cellular communication system that is comprised of a plurality of radio ports that communicate over an air interface with a plurality of terminal devices, where the radio ports have asynchronous transfer mode (ATM) interfaces. A cellular switch is provided having circuit-switching fabric connected to a public switched telephone network (PSTN). A digital cellular switch (DCS) is provided which has ATM fabric, radio link protocol processors and vocoders, where the vocoders are connected to the PSTN and, where the ATM fabric is connected to the radio ports by ATM virtual links. One or more standard hardware platforms implement ATM transport that perform a …
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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 October 10, 2000. 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.