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Expired Canadian patentCanada

Search radar apparatus

CA 1188394 A · Owner: Hollandse Signaalapparaten B.V. · Inventors: Hol, Willem A.

CIPO record

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

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Abstract From the Canadian patent

Abstract, Search radar apparatus containing an MTIvideo processing unit provided with: a canceller (2) for generating video signals of moving targets; a zero-velocity filter (3) for generating clutter video signals; a conditional circuit (4) connected to the canceller (2) and the filter (3) for generating per range quant of each radar scan a clutter switching signal if for the range quant the signal value obtained with filter (3) is greater than the signal value obtained with the canceller (2); a combination circuit (95) connected to said filter (3) and the conditional circuit (4) for selecting the clutter video signals present with the clutter switching signals and for determining …

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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 June 4, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 24, 1982
GrantedJune 4, 1985
Term endedJune 4, 2002
Patent numberCA 1188394 A
Classification (IPC)G01S13/52 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedJune 24, 1982Patent grantedJune 4, 1985Term endedJune 4, 2002

Sources & verification

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