Expired European patentEurope
Coding process for inserting an inaudible data signal into an audio signal, decoding process, coder and decoder
EP 0875107 B1 · Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
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 January 24, 1997 and granted September 1, 1999. A European patent lasts at most 20 years from filing, so its term ended January 24, 2017.
- 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 24, 2022.
- 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 24, 1997
PublishedNovember 4, 1998
GrantedSeptember 1, 1999
Term endedJanuary 24, 2017
Application numberEP 97902223
Classification (CPC)H04H20/31
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.