Multistage switching facility for optical signals
CA 2092482 C · Owner: Bottle, Dietrich · Inventors: Eilenberger, Gert; Bottle, Dietrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multistage switching facility for optical signals where time conversions are only used in the last stage while only space and frequency conversions are used in the other stages. The last stage contains space, time and frequency position converters resulting in a facility in which no signal overtaking is possible when multiple routing is provided in the switching facility.
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 25, 1993 and granted January 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2015.
- 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.