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Expired European patentEurope

Bidirectional transmission line driver/receiver

EP 0827643 B1 · Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION

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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.

Why it's free to use

  • Filed February 23, 1996 and granted January 20, 1999. A European patent lasts at most 20 years from filing, so its term ended February 23, 2016.
  • 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 August 23, 2021.
  • 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.
FiledFebruary 23, 1996
PublishedMarch 11, 1998
GrantedJanuary 20, 1999
Term endedFebruary 23, 2016
Application numberEP 96903133
Classification (CPC)H04L5/1423 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedFeb 23, 1996PublishedMarch 11, 1998Patent grantedJan 20, 1999Term endedFeb 23, 2016

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