Two-frequency impedance matching circuit
CA 2307652 A1 · Owner: Itoh, Yasushi · Inventors: Itoh, Yasushi; Uchida, Hiromitsu; Ohshima, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An impedance matching circuit comprises an output terminal connected with a load; an input terminal for receiving a signal for the load; a series resonance circuit consisting of a series capacitor and a series inductor connected in series with the series capacitor the series resonance circuit , being connected in series with the load viewed from the input terminal; and a parallel resonance circuit consisting of a parallel capacitor and a parallel inductor connected in parallel with the parallel capacitor the parallel , resonance circuit being connected in parallel with the load and the series resonance circuit viewed from the input terminal. This configuration solves the problem that …
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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 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2021.
- 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.