Micro-strip antenna having bi-directional or non-directional characteristic
CA 2256171 C · Owner: Nec Corporation · Inventors: Hirabe, Masashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided an antenna including (a) a first micro-strip antenna (b) a second micro-strip antenna spaced away from and facing the first micro-strip antenna, (c) a round plate located between the first and second micro-strip antennas, the ground plate being formed with an opening between the first and second micro-strip antennas, (d) a first dielectric material sandwiched between the first micro-strip antenna and the ground plate (e) a second dielectric material, sandwiched between the second micro-strip antenna and the ground plate and (i), a micro-strip line formed on a surface of the first dielectric material and connected to the first micro-strip antenna. In accordance with the …
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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 December 15, 1998 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 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.