Focused illumination, reduced light leakage floodlit center high mounted stoplight
CA 2111922 C · Owner: Smith, Ronald T. · Inventors: Smith, Ronald T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A holographic center high mounted stoplight (CHMSL) system for a vehicle having a rear window. The CHMSL system includes a stoplight hologram secured adjacent the rear window, a playback illumination source for providing along a source optical axis a vertically converging beam that converges to a horizontal line focus and a thick, concave/convex lens responsive to the vertically converging beam for (1) controlling the vertically converging beam to converge to a line focus that is within said lens and further from the illumination source than such line focus would be without the lens and (2) providing an output beam along an output axis that is tilted upwardly relative to the source optical …
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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 December 20, 1993 and granted January 28, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 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.