Antenna device for high-frequency radio apparatus, high-frequency radio apparatus, and watch-shaped radio apparatus
CA 2352247 C · Owner: Koyama, Shunsuke · Inventors: Koyama, Shunsuke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna device for a high-frequency radio apparatus that enables the apparatus to be made compact and improves its sensitivity. The antenna has an L-shaped antenna element; the shorter part of which extends perpendicular from ai circuit substrate which has a ground pattern formed thereon. The area of the orthogonal projection of the longer part of the L-shaped antenna element, which is spaced apart from the circuit substrate and substantially parallel to its surface which has the ground pattern formed thereon, is smaller than the area of the ground pattern. The antenna also has a feeding line which is substantially parallel to the shorter part of the L-shaped antenna element. A …
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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 September 28, 2000 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 28, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2022.
- 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.