Broadband antenna using a semicircular radiator
CA 2186186 C · Owner: Kijima, Makoto · Inventors: Kijima, Makoto; Ihara, Taisuke; Tsunekawa, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a broadband antenna using a semicircular conductor disc a semicircular cutout is formed in the semicircular radiator concentrically therewith. Alternatively a semicircular arcwise radiating conductor with a semicircular cutout defined concentrically therewith is bent into a cylindrical shape to form a radiator.
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 September 23, 1996 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2018.
- 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.