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Expired European patentEurope

Method and apparatus for modifying a run-length limited code

EP 0199088 B1 · Applicant: International Business Machines Corporation

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Overview

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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 March 19, 1986 and granted December 16, 1992. A European patent lasts at most 20 years from filing, so its term ended March 19, 2006.
  • 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 19, 2011.
  • 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 19, 1986
PublishedOctober 29, 1986
GrantedDecember 16, 1992
Term endedMarch 19, 2006
Application numberEP 86103742
Classification (CPC)H03M5/145

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedMarch 19, 1986PublishedOct 29, 1986Patent grantedDec 16, 1992Term endedMarch 19, 2006

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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