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Expired European patentEurope

Characterisation of digital radio signals

EP 0183731 B1 · Applicant: AUSTRALIAN AND OVERSEAS TELECOMMUNICATIONS CORPORATION LTD.

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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 May 15, 1985 and granted July 22, 1992. A European patent lasts at most 20 years from filing, so its term ended May 15, 2005.
  • 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 November 15, 2010.
  • 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.
FiledMay 15, 1985
PublishedJune 11, 1986
GrantedJuly 22, 1992
Term endedMay 15, 2005
Application numberEP 85902415
Classification (CPC)H04L25/0202

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedMay 15, 1985PublishedJune 11, 1986Patent grantedJuly 22, 1992Term endedMay 15, 2005

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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