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Expired European patentEurope

Method of establishing transmission group numbers for network links

EP 0333615 B1 · Applicant: International Business Machines Corporation

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 January 31, 1989 and granted October 26, 1994. A European patent lasts at most 20 years from filing, so its term ended January 31, 2009.
  • 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 July 31, 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.
FiledJanuary 31, 1989
PublishedSeptember 20, 1989
GrantedOctober 26, 1994
Term endedJanuary 31, 2009
Application numberEP 89480013
Classification (CPC)H04L41/00 +1 more

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedJan 31, 1989PublishedSep 20, 1989Patent grantedOct 26, 1994Term endedJan 31, 2009

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.