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Expired European patentEurope

Image signal correcting circuit for use in image data processing apparatus

EP 0687101 B1 · Applicant: CANON KABUSHIKI KAISHA

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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 November 6, 1991 and granted February 17, 1999. A European patent lasts at most 20 years from filing, so its term ended November 6, 2011.
  • 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 6, 2017.
  • 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 6, 1991
PublishedDecember 13, 1995
GrantedFebruary 17, 1999
Term endedNovember 6, 2011
Application numberEP 95113540
Classification (CPC)H04N1/401

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedNov 6, 1991PublishedDec 13, 1995Patent grantedFeb 17, 1999Term endedNov 6, 2011

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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