Optical switch with connection verification
CA 2348121 A1 · Owner: Gruber, John G. · Inventors: Gruber, John G.; Bryant, Andrew John; Graves, Alan F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical switch is equipped with a set of optical intensity controllers at its input, each intensity controller being driven to vary a corresponding GVDM input traffic signal with a low power test signal. The switch is also equipped with optical splitters at its output and a path integrity analyzer connected to the splatters and to the intensity controllers. The path integrity analyzer generates or controls generation of the test signals applied by the intensity controllers. The path integrity analyzer also receives the tapped portions of the WDM output signals and separates them into their single-carrier components in order to recover a set of switched single-carrier optical signals. The …
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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 17, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 17, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2023.
- 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.