System for cross-connecting high speed digital sonet signals
CA 2005014 C · Owner: Cochran, William T. · Inventors: Upp, Daniel C.; Cochran, William T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A modular, expandable non-blocking system for cross-, connecting high speed digital signals is provided. The system is capable of connecting DSn, CEPTn, and STSn signals as desired, with lower rate signals being included as components of the high-rate signals or terminating on low speed lines as, desired. The system accomplishes its goals by converting all incoming signals into a substantially SONET format and by, processing all the signals in that format. The signals are typically cross-connected in the substantially SONET format although an expandable non-blocking wide band cross-connect module provided which cross-connects any like signals. If the outgoing signal is to be in other than …
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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 8, 1989 and granted June 7, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 8, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 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.