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Expired European patentEurope

Dynamic echo canceller and parameter selection in telephony systems

EP 0956657 B1 · Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ)

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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 15, 1998 and granted October 25, 2006. A European patent lasts at most 20 years from filing, so its term ended January 15, 2018.
  • 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 15, 2023.
  • 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 15, 1998
PublishedNovember 17, 1999
GrantedOctober 25, 2006
Term endedJanuary 15, 2018
Application numberEP 98902319
Classification (CPC)H04B3/23

Timeline

Timeline From EPO dates

1999200120032005200720092011201320152017Application filedJan 15, 1998PublishedNov 17, 1999Patent grantedOct 25, 2006Term endedJan 15, 2018

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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