Oval resonator device
CA 2374401 A1 · Owner: Chin, Mee Koy · Inventors: Chin, Mee Koy; Ho, Seng-Tiong
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oval resonator device (10) is provided which includes an oval resonator (20) having straight portions for coupling signals from external sources. The straight portions of the oval resonator (20) minimize phase mismatch in a coupled signal. The oval resonator device (10) can be used in various devices including channel-dropping filters, switches turnables filters, phase , modulators, and 1 x N multiplexers/demultiplexers.
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 May 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2022.
- 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.