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Expired European patentEurope

Bus interface device for a data processing system

EP 0120172 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 March 29, 1983 and granted February 3, 1988. A European patent lasts at most 20 years from filing, so its term ended March 29, 2003.
  • 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 29, 2008.
  • 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 29, 1983
PublishedOctober 3, 1984
GrantedFebruary 3, 1988
Term endedMarch 29, 2003
Application numberEP 83430013
Classification (CPC)G06F13/36 +2 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedMarch 29, 1983PublishedOct 3, 1984Patent grantedFeb 3, 1988Term endedMarch 29, 2003

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.