Communication switching system
CA 2006102 C · Owner: De Somer, Michel Philemon Madeleine · Inventors: De Somer, Michel Philemon Madeleine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In this system STM (Synchronous Transfer Mode) and ATM (Asynchronous Transfer Mode) cell streams are supplied to corresponding STM and ATM switching exchanges STME and ATME via the cascade connection of a multiplexer (MUX) a, transmission link (L1) and a demultiplexer (DMUX). The MUX and DMUX are each constituted by a switching element with a plurality of inputs (I1/2; I3) and outputs (O3 O4/5), coupled to a common switching means (SB1 TM1; SB2, TM2), via respective receiver (RC1/3) and transmitter (TC1/3) circuits. The common switching means samples the input cell streams at a frequency at least equal to the sum of the time slot frequencies of the time frames of the input cell streams. 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 December 20, 1989 and granted October 19, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2011.
- 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.