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EP 0283350 B1 · Applicant: ETAT FRANCAIS représenté par le Ministre des PTT (Centre National d'Etudes des Télécommunications)

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Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

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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 February 19, 1988 and granted January 13, 1993. A European patent lasts at most 20 years from filing, so its term ended February 19, 2008.
  • 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 August 19, 2013.
  • 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.
FiledFebruary 19, 1988
PublishedSeptember 21, 1988
GrantedJanuary 13, 1993
Term endedFebruary 19, 2008
Application numberEP 88400392
Classification (CPC)H04H20/38 +1 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedFeb 19, 1988PublishedSep 21, 1988Patent grantedJan 13, 1993Term endedFeb 19, 2008

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

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.