Circularly polarized microcell antenna
CA 2128738 C · Owner: Yarsunas, George D. · Inventors: Yarsunas, George D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A circularly polarized microcell antenna 10 that requires only a single feed-line to radiate circularly polarized electromagnetic energy therefrom. The antenna 10 comprises a reflector box 14 having a bottom 15 and side walls 17 to which an electrical connector 20 is mounted. The center conductor 24 of the connector 20 is electrically connected to a conductor bar 22 upon which a first dipole assembly is mounted at a designated one-quarter wavelength location. The shell of the connector 20 is electrically connected to the reflector box 14 upon which a second dipole assembly is mounted at a designated one-quarter wavelength location. Each dipole assembly comprises a primary dipole arm 52 and …
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 July 25, 1994 and granted December 15, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2016.
- 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.