Multi-colored display
CA 2000332 A1 · Owner: Kircher, Dean M. · Inventors: Kircher, Dean M.; Kircher, Dean M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-colored display using an electroluminescent light panel for use in daylight and darkened conditions. An overlay having designated indicia and background areas is positioned upon the panel to allow light to selectively shine through. The indicia areas may be furnished with a first color which is visible in daylight and also in, darkness by energizing the electroluminescent element; the remaining background areas of the overlay may be colored with a transparent second color which is visible during the day or night. A spectrum of colors is also readily available for use in the indicia and background areas to provide a variegated display.
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
- Filed October 10, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 10, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2011.
- 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.