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Expired Canadian patentCanada

Pulse radar apparatus

CA 1210838 A · Owner: Thales Nederland B.V. · Inventors: Gellekink, Bernard; Hol, Willem A.

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Abstract From the Canadian patent

A pulse radar apparatus is provided with a coherent transmitting and receiving unit (1) for the transmission of radar pulses, the reception of echo signals and the conversion, of said signals into signals of an intermediate frequency fif which may be shifted through a Doppler frequency fd. The echo signals with frequency fif +fd are fed to a detector (7) for the coherent phase detection with a frequency fif + fc. The detected signals are fed to an analogue-to-digital converter (10) which, operates at a frequency of approximately 4fc. The pulse radar apparatus further comprises accumulators (12 13), alternately, fed with the output signals of the analogue-to-digital converter (10) each time …

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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 September 2, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 7, 1983
GrantedSeptember 2, 1986
Term endedSeptember 2, 2003
Patent numberCA 1210838 A
Classification (IPC)G01S7/28 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedNov 7, 1983Patent grantedSep 2, 1986Term endedSep 2, 2003

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