Switch cover plate providing automatic emergency lighting
CA 2289058 A1 · Owner: Electro Static Solutions, Llc · Inventors: Moreland, Greg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wall switch cover plate (40) conceals an electrical circuit (50) capable of sensing the field provided by the covered switch circuit. When power is lost at the switch circuit the electrical circuit (50) senses the loss of power and activates one or more LEDs (56) to provide emergency illumination. The electrical circuit (56) is self contained and does not require stand-by energy so that the batteries are long lasting.
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 April 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 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.