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Expired European patentEurope

Method for the compensation of noise-contaminated speech signals for speech recognition systems

EP 0309869 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 September 20, 1988 and granted April 21, 1993. A European patent lasts at most 20 years from filing, so its term ended September 20, 2008.
  • 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 March 20, 2014.
  • 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.
FiledSeptember 20, 1988
PublishedApril 5, 1989
GrantedApril 21, 1993
Term endedSeptember 20, 2008
Application numberEP 88115412
Classification (CPC)G10L15/20

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedSep 20, 1988PublishedApril 5, 1989Patent grantedApril 21, 1993Term endedSep 20, 2008

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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