Radar apparatus
CA 2095498 A1 · Owner: Hollandse Signaalapparaten B.V. · Inventors: Reits, Bernard Jozef; Groenenboom, Albert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Radar apparatus provided with a transmit generator (1) and antenna means (2) for the transmission of comparatively long linearly, frequency-modulated transmitter pulses. Echo signals are received by antenna means (2) and a heterodyne signal is generated in mixer stage (3). Propagation time differences for different echo pulses are compensated by means of a dispersive delay element (4) incorporated in the radar receiver. Distortion of the echo pulses in the dispersive delay element is corrected on the basis of a Fresnel ripple correction. A Fourier transformation unit (5) transfers the corrected echo pulses to time domain video with low sidelobes.
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 4, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 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.