Adjustable beam tilt antenna
CA 2097122 A1 · Owner: Hadzoglou, James · Inventors: Warner, Michael E.; Hadzoglou, James; Stevens, Harold E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An omni-directional, collinear vertical, base station antenna having an adjustable or variable radiation beam tilt capability. Termination at the drive or feed point is provided by an adjustable capacitive coupling at the feed point between the conductive elements of a feed structure and a radiator assembly for adjusting the physical position of the feed point and thereby the phase of the feed points relative to the upper and lower portions of the antenna, to alter the deflection angle of the radiation produced. Signal feed means, having first and second conductive feed elements, is connectable to a signal feed line to couple a signal between the feed line and the radiator assembly. …
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 May 27, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2015.
- 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.