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Expired European patentEurope

Methods and apparatus for reconstructing non-quantized adaptively transformed voice signals

EP 0470975 B1 · Applicant: PACIFIC COMMUNICATION SCIENCES, INC.

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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 April 9, 1990 and granted September 11, 1996. A European patent lasts at most 20 years from filing, so its term ended April 9, 2010.
  • 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 October 9, 2015.
  • 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.
FiledApril 9, 1990
PublishedFebruary 19, 1992
GrantedSeptember 11, 1996
Term endedApril 9, 2010
Application numberEP 90906553
Classification (CPC)G10L19/002 +1 more

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedApril 9, 1990PublishedFeb 19, 1992Patent grantedSep 11, 1996Term endedApril 9, 2010

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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