Method and apparatus for displaying the status of a system of traffic signals
CA 1298896 C · Owner: Deroche, Robert F. · Inventors: Forbes, James B.; Deroche, Robert F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The status of the traffic signals is repeatedly monitored. A visual display is presented of the spatial arrangement of the traffic signals in the system. The currently monitored status of the traffic signals is repeatedly represented on the display, spatially coordinated with the display of the respective traffic signals. A plurality of previously monitored statuses is also repeatedly represented on the display spatially, coordinated with the respective traffic signals and a traffic speed representation therebetween. The display distinguishes between through grin and local green traffic signal status. A comparison is made of the currently monitored status of a traffic signal under …
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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 April 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 2009.
- 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.