Am noise reducing
CA 2020901 A1 · Owner: Short, William R. · Inventors: Bose, Amar G.; Short, William R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A receiver for receiving an amplitude modulated signal with upper and lower sidebands, comprising: an independent sideband decoder for providing demodulated upper and lower sideband audio signals, a combiner for differentially combining the upper and lower sideband audio signals to provide a noise signal, a quality detector apparatus for providing upper and lower quality signals representative of undesired noise in the upper and lower sideband audio signals respectively and a, selector responsive to the quality signals for processing the upper and lower sideband audio signals to provide an output audio signal with reduced noise. The quality detector includes a correlator for correlating the …
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 July 11, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 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.