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Expired Canadian patentCanada

Indicator for assisting backing of a trailer or any type of towed vehicle

CA 1317818 C · Owner: Woods, John H. · Inventors: Woods, John H.

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

An indicator which is attached to the steering wheel of a vehicle and which has a boat indicia and a front wheel position indicator that rotate with the steering wheel and which has a gravity weighted disk-shape member upon which a towing vehicle is indicated as well as a roadway and which remains in the vertical position as the wheel is rotated so that a position of the vehicle and the trailer can be continuously observed.

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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 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 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.
FiledMarch 10, 1989
GrantedMay 18, 1993
Term endedMay 18, 2010
Patent numberCA 1317818 C
Classification (IPC)B60Q1/42 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMarch 10, 1989Patent grantedMay 18, 1993Term endedMay 18, 2010

Sources & verification

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