Light color and intensity modulation system
CA 2009302 C · Owner: Martel, Alain · Inventors: Martel, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a light color and intensity modulation system having an output to be connected to a color light projector and an input to receive a hue control signal and an intensity control signal including at least one modulation frequency component F. The system comprises a color scaling device, receiving in use the hue signal the color scaling device producing a plurality of color component signals, the plurality of color component signals being supplied as the output to the color light projector and an intensity control device, receiving in use the intensity control signal, the intensity control device comprising a low frequency oscillator whose output is an intensity modulation …
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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 February 5, 1990 and granted September 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2012.
- 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.