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Expired European patentEurope

Method for addressing elementary heads from a magnetic multitrack recording head and head using this method

EP 0481875 B1 · Applicant: THOMSON multimedia

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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 October 15, 1991 and granted August 30, 1995. A European patent lasts at most 20 years from filing, so its term ended October 15, 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 April 15, 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.
FiledOctober 15, 1991
PublishedApril 22, 1992
GrantedAugust 30, 1995
Term endedOctober 15, 2011
Application numberEP 91402748
Classification (CPC)G11B15/12 +1 more

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedOct 15, 1991PublishedApril 22, 1992Patent grantedAug 30, 1995Term endedOct 15, 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

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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