Resonant frequency-temperature characteristics compensable high frequency circuit elemental device
CA 2017722 C · Owner: Hyuga, Takehiro · Inventors: Mukai, Tetsuya; Matsumoto, Kazutoshi; Hyuga, Takehiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
High frequency circuit elemental device A high frequency circuit elemental device comprising a casing and a dielectric ceramic mounted in said casing such as oscillators, said dielectric ceramic being capable of under going order-disorder structural transformation, whereby the temperature coefficient of the resonant frequency of said elemental device can be compensated by heat-treatment of the dielectric ceramic.
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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 May 29, 1990 and granted February 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2012.
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Timeline
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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.