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Expired European patentEurope

Optoelectronic device for reproducing information carried on a magnetic record carrier

EP 0077693 B1 · Applicant: BULL S.A.

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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.

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Why it's free to use

  • Filed March 31, 1982 and granted May 20, 1987. A European patent lasts at most 20 years from filing, so its term ended March 31, 2002.
  • 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 October 1, 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.
FiledMarch 31, 1982
PublishedApril 27, 1983
GrantedMay 20, 1987
Term endedMarch 31, 2002
Application numberEP 82400594
Classification (CPC)G11B11/10543

Timeline

Timeline From EPO dates

1983198519871989199119931995199719992001Application filedMarch 31, 1982PublishedApril 27, 1983Patent grantedMay 20, 1987Term endedMarch 31, 2002

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.