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Expired European patentEurope

Group coding method for serial data transmission

EP 0124959 B1 · Applicant: UNISYS 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 February 15, 1984 and granted July 5, 1989. A European patent lasts at most 20 years from filing, so its term ended February 15, 2004.
  • 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 15, 2009.
  • 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 15, 1984
PublishedNovember 14, 1984
GrantedJuly 5, 1989
Term endedFebruary 15, 2004
Application numberEP 84300972
Classification (CPC)H04L25/4908

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedFeb 15, 1984PublishedNov 14, 1984Patent grantedJuly 5, 1989Term endedFeb 15, 2004

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.