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Expired European patentEurope

Dynamic bit allocation subband excited transform coding method and apparatus

EP 0481374 B1 · Applicant: GTE LABORATORIES INCORPORATED

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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.

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Why it's free to use

  • Filed October 11, 1991 and granted May 2, 1997. A European patent lasts at most 20 years from filing, so its term ended October 11, 2011.
  • 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 April 11, 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.
FiledOctober 11, 1991
PublishedApril 22, 1992
GrantedMay 2, 1997
Term endedOctober 11, 2011
Application numberEP 91117397
Classification (CPC)H04B1/667

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedOct 11, 1991PublishedApril 22, 1992Patent grantedMay 2, 1997Term endedOct 11, 2011

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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