Trickle power supply
CA 2195296 A1 · Owner: Lech, David Allen · Inventors: Lech, David Allen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A trickle power supply for a light switch module according to the invention enables power to an electronic circuit to be taken directly off the hot line. The power supply operates under what is referred to as the "switched leg theory". All power is taken off the standard switched leg of the light circuit. The power supply bleeds enough current to power its electronic circuitry without turning on the load device, i.e. the light. At the same time the, maximum current to the load is limited to prevent shorting out of the power supply which would effectively disable the switch module.
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 January 16, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 2019.
- 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.