Method of manufacturing a high frequency filter and a high frequency filter manufactured according to the method
CA 2065206 A1 · Owner: Turunen, Aimo · Inventors: Turunen, Aimo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1182-4, Abstract, An inexpensive and lightweight air insulated high frequency filter can be made utilizing a radio device's frame and a printed board (15) intended for electrical circuits so that, during manufacture of the printed board (15) it is machined so that several side by side finger-like projecting tongues (141, 142, 143, 144) are formed, which are entirely coated with electrically conducting material. Thereafter the printed board, on which electrical and mechanical components intended for it are mounted, is placed in the radio device's crate-like frame made of conducting material and possibly provided with partition walls (18, 19) and on which also, cover parts are fastened so …
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 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2014.
- 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.