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Expired Canadian patentCanada

System for displaying solid radar and/or sonar targets on a television monitor or other raster scan display

CA 1238399 A · Owner: Isc Cardion Electronics, Inc. · Inventors: Williams, John J. Jr.; Bergman, H. Barry; Macdonald, Robert

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

The invention of this disclosure is a system for filling in holes on a television monitor or other raster scan display which result when information is transformed from one coordinate system that represents a series of locations by at least a series of first and second numbers to another coordinate system that represents a series of locations by at least a series of third and fourth numbers. The apparatus of this invention accomplishes the foregoing by doing extra conversions for each first number at slightly different second numbered values thereby producing slightly, different third and fourth numbered values which will fill in the holes of the display.

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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 21, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 21, 2005.
  • 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 24, 1985
GrantedJune 21, 1988
Term endedJune 21, 2005
Patent numberCA 1238399 A
Classification (IPC)G01S7/06

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedMay 24, 1985Patent grantedJune 21, 1988Term endedJune 21, 2005

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