Dielectric resonator device
CA 2267504 C · Owner: Hiratsuka, Toshiro · Inventors: Sonoda, Tomiya; Hiratsuka, Toshiro; Mikami, Shigeyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dielectric resonator device is disclosed in which characteristics of a plane circuit type dielectric resonator device applicable to miniaturization is included; non-loading Q0f a resonator is increased so as to decrease insertion loss in the case of forming a band pass filter or the like; reduce changes in filter characteristics with respect to changes in structural dimensions of the length of the resonator the gap between the resonators, or the like; and increase freedom in adjustment of resonant frequency to enhance production efficiency. In this arrangement on each main surface of a dielectric plate are disposed an electrode having mutually opposing openings which serve as a …
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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 March 30, 1999 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 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.