Filter tuning device and tuning plate including a number of such devices
CA 2291100 A1 · Owner: Henningsson, Bo Uno Egon · Inventors: Henningsson, Bo Uno Egon; Lindell, Sven Patrik
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a tuning device in a radio filter equipment for mobile telephony in which one or more cavities in the equipment should be tuned to the right frequency. The invention also relates to a tuning plate including a number of such tuning devices. The tuning device (401) consists of preferably regular or square formed depressed parts (1 6) in the tuning plate , (300) of the filter equipment. The depressed part converges each to a square formed central plate (5) which is provided with an elevation or bulb (3) upwards. By turning a tuning screw on the equipment will then develop a force on the plate and the surrounding depressed parts. This implies that the …
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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 15, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2020.
- 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.