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Expired Canadian patentCanada

Anti-lock control method for vehicle

CA 1313904 C · Owner: Iwagawa, Yoshihiro · Inventors: Matsuda, Shohei; Muto, Tetsuji; Yahagi, Toshio

CIPO record

Overview

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Abstract From the Canadian patent

A signal value on the basis of a lower wheel speed is compared with a signal value on the basis of a high wheel speed and, when the difference therebetween is larger than a predetermined value, a higher vehicle speed of two previously estimated vehicle speeds is used for anti-lock control and a reference value with which a wheel speed will be compared is derived from such vehicle speed. Thus, a range of condition for judging that wheels of a vehicle are about to be locked is enlarged.

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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 February 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 23, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 25, 1988
GrantedFebruary 23, 1993
Term endedFebruary 23, 2010
Patent numberCA 1313904 C
Classification (IPC)B60T8/32 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJan 25, 1988Patent grantedFeb 23, 1993Term endedFeb 23, 2010

Sources & verification

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