Transmission line, resonator, filter, duplexer, and communication apparatus
CA 2305854 C · Owner: Murata Manufacturing Co. Ltd. · Inventors: Hidaka, Seiji; Ota, Michiaki; Abe, Shin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmission line, a resonator, a filter a duplexer, and a communication apparatus efficiently minimize power losses due to edge effects, thereby having superior loss-reduction characteristics. A continuous line and a plurality of thin lines each having a predetermined length and branching from both sides of the continuous line are formed on a dielectric substrate. According to this substantial edges of the individual thin lines do not exist and losses due to edge effects can be efficiently minimized.
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 17, 2000 and granted August 5, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 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.