Radar reflecting target
CA 2053872 A1 · Owner: Racal Defence Electronics(Radar) Limited · Inventors: Allington, Marcus L.; East, Peter W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radar reflecting target comprises a plurality of reflecting elements (10) spread along at least one linear physical dimension of the target, the elements (10) being differingly spaced in the direction normal to said dimension so that respective retro-reflections by the elements of radio frequency energy from a remote source on a line of sight at an angle to said dimension have, differing phases and tend to cancel each other out. The invention may be applied to single or two dimensional surfaces on such vehicles as ships or aeroplanes.
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 April 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2012.
- 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.