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Expired Canadian patentCanada

Ring laser gyro system

CA 1205171 A · Owner: Honeywell Inc. · Inventors: Morgan, Avery A.

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

A laser gyro system having two counter-travelling beams is disclosed wherein the lock-in error in the gyro output is compensated by generating incremental error paramaters which are related to the instantaneous phase difference between the two counter-travelling beams, the parameters being applied to the output directly to reduce the error or being used in a control loop to indirectly reduce the error.

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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 27, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 2003.
  • 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
GrantedMay 27, 1986
Term endedMay 27, 2003
Patent numberCA 1205171 A
Classification (IPC)G01C19/64

Timeline

Timeline From CIPO dates

1983198619891992199519982001Application filedJune 24, 1982Patent grantedMay 27, 1986Term endedMay 27, 2003

Sources & verification

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