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Expired European patentEurope

Method and circuit for enhancing the resolution of digital signals

EP 0303978 B1 · Applicant: Deutsche Thomson-Brandt GmbH

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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 August 12, 1988 and granted November 30, 1994. A European patent lasts at most 20 years from filing, so its term ended August 12, 2008.
  • 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 February 12, 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.
FiledAugust 12, 1988
PublishedFebruary 22, 1989
GrantedNovember 30, 1994
Term endedAugust 12, 2008
Application numberEP 88113105
Classification (CPC)H04N19/60

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedAug 12, 1988PublishedFeb 22, 1989Patent grantedNov 30, 1994Term endedAug 12, 2008

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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