The strengthened quad antenna structure
CA 2223668 C · Owner: Morton, Robert · Inventors: Podger, James Stanley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna structure is disclosed that is a loop of conductors approximately , one, wavelength in perimeter plus a supporting conductor connected from one side of the loop to the, opposite side. This antenna structure is connected to the associated electronic equipment, in a, balanced manner with respect to the supporting conductor effectively at , either connection, between the loop and the supporting conductor. Because of the balanced connection, the, supporting conductor carries very little current and has very little influence on the electrical, operation of the loop. Such a structure could be made stronger than the traditional , one-wavelength loops supported by insulators because …
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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 February 23, 1998 and granted July 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 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.