Luminous power supply
CA 2030170 A1 · Owner: Watts, Gary P. · Inventors: Watts, Gary P.; Johnson, Richard A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power supply apparatus is provided for converting direct currents into higher voltage high frequency alternating currents at adjustable amperages. The apparatus include an intensity adjustment for providing a duty cycle modulation voltage indicative of a selected average current to be output, a duty cycle modulation responsive to the modulation voltage to provide driver-enabling signals at a fixed oscillator frequency with duty cycles, modulated in proportion to the modulation voltage at two enabling, terminals in alternate periods of said oscillator and a driver including two, current switches each connected through an end of a respective primary transformer coil in parallel between a …
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 November 16, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 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.