Method for expanding a normal three-stage switching array
CA 2017136 C · Owner: Brunle, Siegfried · Inventors: Brunle, Siegfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of expanding a regular three-stage switching array. Original switching blocks of the first and third stages having a smaller number of crosspoints are enlarged to switching blocks having a larger number of crosspoints by, combining the original switching blocks. In addition the, three stages are expanded by adding additional switching blocks. After the enlarged blocks are formed at least one, additional block is added to the second stage and some of, the connection paths between the enlarged blocks and the blocks of the second stage are rerouted to the additional blocks. The rerouting is performed for the original blocks of the second stage one at a time. In order to avoid …
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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 May 18, 1990 and granted March 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 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
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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.