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Expired European patentEurope

Modulation method and circuit arrangement for the transmission of data signals

EP 0835561 B1 · Applicant: Deutsche Telekom AG

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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 June 26, 1996 and granted March 15, 2000. A European patent lasts at most 20 years from filing, so its term ended June 26, 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 December 26, 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.
FiledJune 26, 1996
PublishedApril 15, 1998
GrantedMarch 15, 2000
Term endedJune 26, 2016
Application numberEP 96920700
Classification (CPC)H04H20/36

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedJune 26, 1996PublishedApril 15, 1998Patent grantedMarch 15, 2000Term endedJune 26, 2016

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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