Optical transmission system
CA 2099218 A1 · Owner: Farrington, Jeffrey G. · Inventors: Kirkby, Paul A.; Chown, Martin; Chown, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A long haul optical transmission system e.g. for transoceanic, applications, comprises a hybrid arrangement of a small number of optoelectronic regenerators (15) and a larger number of optical amplifiers (14). The arrangement permits the use of low cost fibre and, by using only a small number of regenerators significantly, reduces the system cost in comparison with an all repeatered system.
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 June 25, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 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.