Antenna for a radio base station
CA 2080934 C · Owner: Kawano, Minori · Inventors: Kondo, Yasuhiro; Kawano, Minori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna for a radio base station comprising a base plate having a limited length; attaching portions provided in the base plate and arranged in a longitudinal direction and a transverse direction of the base plate at intervals of approximately a quarter of a wavelength of an electromagnetic wave; radiation elements provided at first selected ones of the attaching portions; and stick-like non-power-feeding reflectors or directors attached to second selected ones of the attaching portions surrounding the radiation elements, thereby providing a desired directivity thereof.
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 October 20, 1992 and granted September 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2014.
- 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.