Self-routing network using optical gate array driven by control voltages coincidental with packet header pulses
CA 2055546 C · Owner: Nishio, Makoto · Inventors: Nishio, Makoto; Suzuki, Shuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an optical self-routing network, N optical splitters are associated respectively with N inlet terminals for splitting an optical signal from the associated inlet terminal into M replicas of the optical signal. M optical combiners, associated respectively with M outlet terminals combines N, optical signals incident thereon into a combined optical signal and couples it to the associated outlet terminal. M sets of N optical gates are connected between the N optical splitters and the M optical combiners. Each optical gate allows passage of an optical signal incident thereon when it timely coincides with an electrical signal applied thereto. A controller supplies a gate control electrical …
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 November 14, 1991 and granted February 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2013.
- 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.