Ultrashort optical pulse modulating equipment
CA 2015039 C · Owner: Shimazu, Yoshihiro · Inventors: Shimazu, Yoshihiro; Tsukada, Masato
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In ultrashort optical pulse modulating equipment optical pulses emitted from a laser in synchronism with input electrical signals are modulated by the electrical signals, the modulated optical pulses are applied to a first-stage pulse interval compressor, in which they are alternately distributed, one by one, by an optical switch to two optical fiber delay lines, two modulated optical pulses delayed by the two optical fiber delay lines are brought close to each other, and modulated optical pulse groups, each composed of two closely spaced modulated optical pulses, are output from an optical coupler. Also in the next-stage pulse interval compressor the modulated optical pulse groups input …
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 April 20, 1990 and granted March 23, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2012.
- 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.