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Expired Canadian patentCanada

Bass management systems

CA 2496474 C · Owner: Nitzpon, Hans-Juergen · Inventors: Nitzpon, Hans-Juergen; Eid, Bradley F.

CIPO record

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Abstract From the Canadian patent

Sound processing systems have been developed that create a surround effect without quality degradation experienced by known sound processing systems in non-optimum listening environments. The sound processing systems may include matrix decoding systems that manipulate input signals prior to converting them into a number of input signals. These sound processing systems may also alternately include a bass management system that from the input signals preserves the low frequency components of the input signals in separate channels. Both the matrix decoding systems and bass management systems may also produce additional signals. Further the matrix decoding and bass , management systems …

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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 June 24, 2004 and granted April 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 24, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 24, 2004
GrantedApril 3, 2012
Term endedJune 24, 2024
Patent numberCA 2496474 C
Classification (IPC)H04S3/02 +1 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedJune 24, 2004Patent grantedApril 3, 2012Term endedJune 24, 2024

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.