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Expired European patentEurope

Apparatus for matching unbalanced R.F. baseband signals to balanced signals on a twisted two-wire line

EP 0302162 B1 · Applicant: 3Com 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.

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Why it's free to use

  • Filed January 19, 1988 and granted April 12, 1995. A European patent lasts at most 20 years from filing, so its term ended January 19, 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 July 19, 2013.
  • 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.
FiledJanuary 19, 1988
PublishedFebruary 8, 1989
GrantedApril 12, 1995
Term endedJanuary 19, 2008
Application numberEP 88100663
Classification (CPC)H03H7/42

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJan 19, 1988PublishedFeb 8, 1989Patent grantedApril 12, 1995Term endedJan 19, 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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