High bit rate cell switching element in cmos technology
CA 2092664 C · Owner: Cselt - Centro Studi E Laboratori Telecommunicazioni S.P.A. · Inventors: Licciardi, Luigi; Turolla, Maura; Gandini, Marco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The switching element allows building up of ATM exchanges capable of processing cell flows at bit rates higher than 700 Mbit/s. It uses an architecture with, output queues, implemented through a unique shared memory suitably controlled , in, order to obtain spatial cell switching towards the outputs. ATM cells are converted, into a highly parallel format by a structure named rotation memory where , through the, cells are then transferred into the master memory. The rotation memory is used also, for the inverse operations of format restoration towards the output. The element, control circuit is entrusted with the generation of writing and reading addresses of the, master memory, in …
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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, 1993 and granted October 12, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2015.
- 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.