Clock signal generating apparatus and clock signal generating method
CA 2198338 C · Owner: Ukai, Manabu · Inventors: Matsumoto, Hiroaki; Ukai, Manabu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an apparatus for generating a clock signal with the phase thereof locked to the phase of a horizontal synchronization signal, noise superposed on the horizontal synchronization signal of a digital video signal is eliminated. A noise suppressing block is provided in front of a phase comparator. Typically, the noise suppressing block comprises a slice block and a spike removing block. The noise suppressing block is used for eliminating noise superposed on the horizontal synchronization signal of a digital video signal which is output by an A/D converter.
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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 February 24, 1997 and granted May 14, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 24, 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.