Dual-band, dual polarization radiating structure
CA 2208467 A1 · Owner: Cal Corporation · Inventors: Raab, Anthony Rowland
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An integrated multi-band and multi-polarization antenna array comprising: a plurality of first waveguides located in spaced parallel relationship, the waveguides being dimensioned so as to carry signals of a first wavelength, the waveguides containing slots in a first surface so as to radiate the signals carried by the first waveguides with horizontal polarization, a plurality of second waveguides located in spaced parallel relationship to each other and to the first waveguides, and bridging and abutting the first waveguides adjacent a second surface opposite the first surface, the second waveguides being dimensioned to carry signals of the first wavelength, the second waveguides containing …
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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 June 23, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 2019.
- 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.