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Expired Canadian patentCanada

Continuous wave radar altimeter

CA 1341358 C · Owner: Selex Sensors And Airborne Systems Limited · Inventors: Walls, Raymond John

CIPO record

Overview

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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 continuous wave radar altimeter comprises a pulsed power control (4), operable when the signal-to-noise ratio of the received signal is likely to be too low to pulse, the transmitted power so that the power varies between a non-zero base level and a higher level. The receiver channel (13, 14) is switched off during each transmitted pulse.

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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 May 14, 2002. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 27, 1988
GrantedMay 14, 2002
Term endedMay 14, 2019
Patent numberCA 1341358 C
Classification (IPC)G01C5/00 +2 more

Timeline

Timeline From CIPO dates

19891993199720012005200920132017Application filedMay 27, 1988Patent grantedMay 14, 2002Term endedMay 14, 2019

Sources & verification

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