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Expired Canadian patentCanada

Marine traffic conflict assessment system

CA 1053781 A · Owner: Sperry Rand Corporation · Inventors: Isbister, Eric J.; O'Sullivan, James P.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

The invention is a radar harbor surveillance sensor computer, and display system for providing a graphic display of vessels negotiating confined navigation channels and permitting rapid and accurate assessment of the degree of hazard or safety of the monitored vessels.

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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 1, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMay 1, 1979
Term endedMay 1, 1996
Patent numberCA 1053781 A
Classification (IPC)G01S5/00 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedMay 1, 1979Term endedMay 1, 1996

Sources & verification

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