Signal processing apparatus and method
CA 2105682 C · Owner: Diab, Mohamed K. · Inventors: Kiani-Azarbayjany, Esmaiel; Diab, Mohamed K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A signal processor which acquires a first signal (S?a) including a first desired signal portion (Y?a) and a first undesired signal portion (n?a), and a second signal (S?b) including a second desired signal portion (Y?b) and a second undesired signal portion (n?b), wherein the first and second desired signal portions are correlated. The processor (26) of the present invention generates a noise reference signal (n'(t)) which is a combination of only the undesired signal portions and is correlated to both the first and second undesired signal portions. The noise reference signal (n'(t)) is then used to remove the undesired portion of each of the first and second measured signals via an …
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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 March 5, 1992 and granted September 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2014.
- 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
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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.