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Expired Canadian patentCanada

High resolution short range pulse radar

CA 1332846 C · Owner: Ahern, John · Inventors: Ahern, John; Delisle, Gilles Y.; Lecours, Michel

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A short range, high resolution, radar system of particular use in training radar operators. The system transmits very short pulses of a radio-frequency (RF) signal at a very high pulse repetition frequency PRFo. A signal, pre-processor samples a received baseband radar signal and generates a time-expanded signal which is a replica of the real received radar signal, but with a much lower nominal pulse repetition frequency, PRFn. The signal pre-processor includes a sampling circuit which receives the baseband signal, and a timing circuit which controls the sampling circuit. The timing circuit operates by causing samples of the baseband signal to be taken at progressively later portions of …

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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

  • Granted November 1, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 1, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 24, 1989
GrantedNovember 1, 1994
Term endedNovember 1, 2011
Patent numberCA 1332846 C
Classification (IPC)G01S13/10 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedFeb 24, 1989Patent grantedNov 1, 1994Term endedNov 1, 2011

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.