A device for coupling radio frequency energy from various transmission lines using variable impedance transmission lines
CA 2479173 A1 · Owner: English, Richard D. · Inventors: Stein, Richard P.; Mccoy, James W.; English, Richard D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for coupling energy from a transmission line (100) is provided. The apparatus includes a contact (104) designed to "tap" into an inner conductor (102) of the transmission line (100) through an aperture in an outer conductor of the transmission line. A portion of the contact (104) may be coiled (e.g. a spring) and the coil's characteristics may be varied to control the insertion loss and coupling loss of the apparatus. For example the wire size, coil diameter, number of turns and pitch design of the coil , may be controlled. The apparatus may also include a secondary transmission line connected to the coil and the secondary transmission line may allow …
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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 March 11, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 11, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2025.
- 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.