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Expired European patentEurope

Method and apparatus for the automatic determination of phonological rules as for a continuous speech recognition system

EP 0387602 B1 · Applicant: International Business Machines 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.

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Why it's free to use

  • Filed February 27, 1990 and granted July 27, 1994. A European patent lasts at most 20 years from filing, so its term ended February 27, 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 August 27, 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.
FiledFebruary 27, 1990
PublishedSeptember 19, 1990
GrantedJuly 27, 1994
Term endedFebruary 27, 2010
Application numberEP 90103824
Classification (CPC)G10L15/14

Timeline

Timeline From EPO dates

1991199319951997199920012003200520072009Application filedFeb 27, 1990PublishedSep 19, 1990Patent grantedJuly 27, 1994Term endedFeb 27, 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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