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Expired European patentEurope

Dynamic range compression

EP 0530342 B1 · Applicant: BRITISH BROADCASTING CORPORATION

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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 March 20, 1992 and granted December 29, 1997. A European patent lasts at most 20 years from filing, so its term ended March 20, 2012.
  • 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 September 20, 2017.
  • 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.
FiledMarch 20, 1992
PublishedMarch 10, 1993
GrantedDecember 29, 1997
Term endedMarch 20, 2012
Application numberEP 92906841
Classification (CPC)H03G7/002 +1 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedMarch 20, 1992PublishedMarch 10, 1993Patent grantedDec 29, 1997Term endedMarch 20, 2012

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