Artificial line
CA 2315075 A1 · Owner: Forsvarets Forskningsanstalt · Inventors: Ouacha, Aziz; Carlegrim, Borje
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an artificial line i.e. an artificial , electric line, and specifically an artificial line having a constant group delay in a wide frequency range (octave bandwidths). The artificial line comprises two identicial inductors of the magnitude L connected in series and having a mutual inductance M, and a capatitor of the magnitude C1 over the inductors and a shunt capacitor C2 to earth. The element values as a fonction of the cut-off frequency fc and the characteristic impedance Z0 are selected according to the equations (1). The artificial line can then be realised as a continuously tunable artificial line or as a self-switched artificial line. The two …
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 10, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2020.
- 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.