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Expired European patentEurope

Audio signal transmission method

EP 0277613 B1 · Applicant: Deutsche Thomson-Brandt GmbH

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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 30, 1988 and granted November 30, 1994. A European patent lasts at most 20 years from filing, so its term ended January 30, 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 30, 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 30, 1988
PublishedAugust 10, 1988
GrantedNovember 30, 1994
Term endedJanuary 30, 2008
Application numberEP 88101359
Classification (CPC)H04B1/665

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJan 30, 1988PublishedAug 10, 1988Patent grantedNov 30, 1994Term endedJan 30, 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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.