Roadreader
CA 1339822 C · Owner: Mackelvie, Winston R. · Inventors: Mackelvie, Winston R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for improving safety in land vehicle traffic. This invention is a road scanning apparatus fitted to the front corners of a road vehicle which can continuously warn the driver of vehicle proximity to the painted traffic lane marks on the normal road surface. The scanning system detects the change in intensity of retro-reflected light from asphalt to a painted line mark as well as geometric characteristics of the line. Modification to existing roads is thus uneccessary. Moreover, this apparatus can be enhanced to include additional capabilities such as a optical communication system whereby coded information e.g. 'Bar Codes' painted onto road, surfaces can be read and decoded and …
Read the whole patent
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 April 14, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.