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Expired European patentEurope

Method of recognizing digital data when using a digital data transmission, particularly a data transmission in mobile radio communication systems

EP 0048865 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 10, 1981 and granted December 27, 1984. A European patent lasts at most 20 years from filing, so its term ended September 10, 2001.
  • 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 10, 2007.
  • 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 10, 1981
PublishedApril 7, 1982
GrantedDecember 27, 1984
Term endedSeptember 10, 2001
Application numberEP 81107157
Classification (CPC)H04L1/20 +1 more

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedSep 10, 1981PublishedApril 7, 1982Patent grantedDec 27, 1984Term endedSep 10, 2001

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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