Noise suppression system
CA 2025696 A1 · Owner: Tse, Lawrence T. · Inventors: House, Ronald R.; Tse, Lawrence T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The noise suppression system has a discriminator an, amplitude circuit and a filtering circuit. The discriminator has an input sensor, a timer and a decision unit. The input sensor senses when the incoming signal is over a given amplitude threshold and starts the timer running. The decision unit determines when the time is over a given time threshold and the discriminator informs the amplitude circuit. The amplitude circuit has an amplitude sensor and a control unit. The amplitude sensor senses the amplitude of the incoming signal when the discriminator has a signal over the given time threshold and the amplitude sensor relays the amplitude to the control unit. The control unit outputs a …
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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 September 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 19, 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.