Method and apparatus for cancelling spread-spectrum noise
CA 2097692 C · Owner: Meidan, Reuven · Inventors: Stilwell, James Howard; Meidan, Reuven; Kotzin, Michael D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spread-spectrum noise, canceller is provided for cancelling user code noise from a, spread-spectrum communication channel. The spread-spectrum, noise canceller includes a receiver for receiving a spread-spectrum, signal (114 202 or 302) including, a first (108, 204 or 304) and at least a second (110, 206 or 306), signal as well as a noise canceller operatively coupled to the receiver, for reducing spread-spectrum noise in the first received signal, (108 204 or 304) by substantially, processing the at least second received signal out of the received, spread-spectrum signal (114 202, or 302). In addition, a method is provided which cancels user code, noise from a spread-spectrum …
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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 December 20, 1991 and granted November 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.