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Expired Canadian patentCanada

Method and apparatus for measuring relative heading changes in a vehicular onboard navigation system

CA 1287401 C · Owner: Milnes, Kenneth A. · Inventors: Zavoli, Walter B.; Milnes, Kenneth A.; Peterson, Glenn R.

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Abstract From the Canadian patent

Abstract of the Disclosure, A method and apparatus for measuring relative heading changes in a vehicular onboard navigation system is provided comprising apparatus for providing signals corresponding to differential wheel distance measurements, the velocity and wheel tracking distance of the vehicle. When front wheel distance measurements are used in a vehicle having an Ackerman-type steering system, an apparatus for providing a signal corresponding to an effective front wheel tracking distance as a function of the curvature of turn is 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 August 6, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 28, 1988
GrantedAugust 6, 1991
Term endedAugust 6, 2008
Patent numberCA 1287401 C
Classification (IPC)—

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedSep 28, 1988Patent grantedAug 6, 1991Term endedAug 6, 2008

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