Space/time switching element
CA 2070000 C · Owner: Wohr, Peter · Inventors: Wohr, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Starting point: The capacity of a switching network could be increased by increasing the clock rate but the necessary , changes in all interfaces can only be made on a very long-term basis. Technical problem: temporary solution which permits gradual replacement or expansion with new interfaces. Basic idea: use of switching elements whose inputs and outputs are switchable separately between two bit rates. Solution: frame structure based on the lowest bit rate. Within such a frame even signals with the highest bit, rate can be buffered and converted in time. 4 Mb/s and 32 Mb/s are planned. Advantage: combination of several channels into higher-capacity connections (N x 64 Kb/s) readily …
Read the whole patent
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 May 29, 1992 and granted October 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 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
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.