Expired European patentEurope
Method and apparatus for encoding multibit coded digital sound through subtracting adaptive dither, inserting buried channel bits and filtering, and encoding apparatus for use with this method
EP 0691052 B1 · Applicant: Koninklijke Philips Electronics N.V.
Overview
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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 13, 1994 and granted October 30, 2002. A European patent lasts at most 20 years from filing, so its term ended December 13, 2014.
- A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by June 13, 2020.
- We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledDecember 13, 1994
PublishedJanuary 10, 1996
GrantedOctober 30, 2002
Term endedDecember 13, 2014
Application numberEP 95901577
Classification (CPC)G10L19/018 +1 more
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.