Solid-state warning light with environmental control
CA 2433711 A1 · Owner: Sws Star Warning Systems Inc. · Inventors: Toulmin, John W.; Balogh, Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates generally to warning lights and more , specifically, to solid-, state (LED) warning lights whose operation is modulated in response to environmental, conditions, generally under the supervision of a microprocessor or dedicated control, circuit. LEDs are used in warning lights but not in an effective way. , Typically the LED, driving circuits are electrically inefficient and in some cases there is an , attempt to, minimize the power that is supplied to the LEDs. The invention employs environmental, sensors which allow the operation of the LEDs to be optimized; for example: LED, intensity can be increased in response to poor ambient visibility duty cycle , …
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 June 26, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 26, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 26, 2025.
- 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.