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Expired European patentEurope

Noise damping method for an optical pick-up device

EP 0309675 B1 · Applicant: Deutsche Thomson-Brandt GmbH

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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 July 25, 1988 and granted March 10, 1993. A European patent lasts at most 20 years from filing, so its term ended July 25, 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 January 25, 2014.
  • 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.
FiledJuly 25, 1988
PublishedApril 5, 1989
GrantedMarch 10, 1993
Term endedJuly 25, 2008
Application numberEP 88111951
Classification (CPC)G11B11/10532 +2 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedJuly 25, 1988PublishedApril 5, 1989Patent grantedMarch 10, 1993Term endedJuly 25, 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

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