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Expired Canadian patentCanada

Marine radar system

CA 1092689 A · Owner: Raytheon Company · Inventors: Chambers, Derek

CIPO record

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Abstract From the Canadian patent

Abstract of the Disclosure A marine radar system having a constant brightness display presentation upon all range settings and with independent switched power supplies for both the MTR and indicator units. The switching frequencies of the power supplies are independent from each other and those of the data clocks and PRF with the switching frequencies of the power supplies being intermediate those of the data clocks and PRF. Means is provided for switching the bandwidth of the system in accordance with the range setting. A digital STC circuit and a North stabilization device are also provided.

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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 December 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 1997.
  • 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 30, 1977
GrantedDecember 30, 1980
Term endedDecember 30, 1997
Patent numberCA 1092689 A
Classification (IPC)G01S7/06 +1 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJune 30, 1977Patent grantedDec 30, 1980Term endedDec 30, 1997

Sources & verification

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