A voltage regulator in a television apparatus
CA 2001907 C · Owner: Rodriquez-Cavazos, Enrique · Inventors: Rodriquez-Cavazos, Enrique; Stephens, Joseph Curtis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An input signal at a horizontal frequency is coupled to a deflection circuit through an isolation transformer during a power-on operation but not during a power-off operation. A voltage at a horizontal deflection frequency is developed in a linearity inductor of the deflection circuit. The voltage in the linearity inductor is rectified to produce a rectified signal that is coupled to an input terminal of a regulator oscillator of a power supply. The rectified signal is coupled to the regulator oscillator in an electrically nonisolated manner with respect to electrical shock hazard isolation and is, electrically isolated by the transformer from the input signal. The regulator oscillator …
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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 October 31, 1989 and granted December 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 31, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 31, 2011.
- 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.