Sensor determined light controlled multi-way intersection
CA 2244161 A1 · Owner: Bardhan, Bibhuti Bhusan · Inventors: Bardhan, Bibhuti Bhusan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
At a multi-way intersection (that is, road junction) the vehicle that comes , to a complete stop at the said intersection before any other vehicle or vehicles has the right of way (to cross the said intersection). However, there is an element of honest human error or a possibility of other , false judgment or inadvertent error or even of unscrupulous attempt to take advantage of any element of uncertainty, in deciding which, vehicle does arrive or come to a complete stop before another at the intersection. This may cause anxiety in drivers and possible accidents. The present invention prevents or minimizes or eliminates such deleterious, human factors by use of state-of the-art sensors …
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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
- Filed August 28, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2020.
- 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.