Dielectric filter, transmission-reception sharing unit, and communication device
CA 2269485 C · Owner: Murata Manufacturing Co. Ltd. · Inventors: Sonoda, Tomiya; Iio, Kenichi; Hiratsuka, Toshiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dielectric filter, a transmission-reception shared unit, and a transceiver, which incorporate the filter are, disclosed; in which spurious modes such as HE110 mode HE210, mode, HE310 mode, etc. can be suppressed so as to improve blocking-band attenuation characteristics. The dielectric filter comprises a dielectric plate; electrodes having electrodeless parts, which are formed on both main surfaces of the dielectric plate so as to form dielectric resonators; and probes disposed parallel to the line along which the dielectric resonators are aligned.
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 April 21, 1999 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 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.