Common memory switch for routing data signals
CA 2058816 C · Owner: Bell-Northern Research Ltd. · Inventors: Munter, Ernst August
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to handle a synchronous transfer mode (ATM) cells and synchronous transfer mode (STM) words in a single switch, STM words incoming on a channel are accumulated until a desired data block is available and a switch header is then added thereto in order to form an STM switch cell. The header includes routing information and a flag indicating the switch cell comprises STM words. In additional, a switch header is added to each ATM cell incoming on a channel in order to form an ATM switch cell. The header added to ATM cells includes routing information and a flag indicating the cell comprises an ATM cell. The ATM and STM switch cells feed input channels of a common memory switch. An ATM …
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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 January 6, 1992 and granted May 5, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 6, 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
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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.