Protection for mems cross-bar switch
CA 2366438 A1 · Owner: Tellium, Inc. · Inventors: Tomlinson, W. John; Bala, Krishna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protection system for a micro electro-mechanical system (MEMS) cross-bar switch (200) is described. Optical signals that are cross-connected by a NxN optical matrix switch are routed through alternative protection paths using protection switch elements (210, 220, 230). The protection switch elements (210, 220, 230) are incorporated as part of the silicon wafer based fabricated structure that forms the NxN optical matrix. The protection switch elements (210, 220, 230) enable the NxN optical matrix switch to recover from one or more failures in switch elements of the NxN optical matrix using alternative protection paths that have the same path length as the original optical path.
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 March 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2022.
- 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.