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Expired European patentEurope

Data reduction method for digital processing a series of signal values

EP 0477690 B1 · Applicant: SIEMENS AKTIENGESELLSCHAFT

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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 September 12, 1991 and granted March 20, 1996. A European patent lasts at most 20 years from filing, so its term ended September 12, 2011.
  • 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 March 12, 2017.
  • 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.
FiledSeptember 12, 1991
PublishedApril 1, 1992
GrantedMarch 20, 1996
Term endedSeptember 12, 2011
Application numberEP 91115491
Classification (CPC)H03M7/30 +2 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedSep 12, 1991PublishedApril 1, 1992Patent grantedMarch 20, 1996Term endedSep 12, 2011

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

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