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Expired European patentEurope

Line driver with adaptive output impedance

EP 0664937 B1 · Applicant: Koninklijke Philips Electronics N.V.

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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 July 4, 1994 and granted December 18, 2002. A European patent lasts at most 20 years from filing, so its term ended July 4, 2014.
  • 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 January 4, 2020.
  • 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.
FiledJuly 4, 1994
PublishedAugust 2, 1995
GrantedDecember 18, 2002
Term endedJuly 4, 2014
Application numberEP 94918489
Classification (CPC)H04L25/0278 +2 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJuly 4, 1994PublishedAug 2, 1995Patent grantedDec 18, 2002Term endedJuly 4, 2014

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.