Patent Yard Sign in
Expired European patentEurope

Error prevention in TTL circuits

EP 0080874 B1 · Applicant: FUJITSU LIMITED

EPO PDF

Overview

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

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed November 26, 1982 and granted March 30, 1988. A European patent lasts at most 20 years from filing, so its term ended November 26, 2002.
  • 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 May 26, 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.
FiledNovember 26, 1982
PublishedJune 8, 1983
GrantedMarch 30, 1988
Term endedNovember 26, 2002
Application numberEP 82306311
Classification (CPC)H03K17/22

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedNov 26, 1982PublishedJune 8, 1983Patent grantedMarch 30, 1988Term endedNov 26, 2002

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.