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Improvements in apparatus for reproducing motion picture film photographic sound-tracks

EP 0119829 A2 · Applicant: DOLBY LABORATORIES LICENSING CORPORATION

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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 14, 1984 and never granted as a European patent. Had it been granted, its 20-year term would have ended March 14, 2004.
  • 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 September 14, 2009.
  • 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 14, 1984
PublishedSeptember 26, 1984
GrantedNever granted
Term endedMarch 14, 2004
Application numberEP 84301736
Classification (CPC)G11B7/007 +2 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedMarch 14, 1984PublishedSep 26, 1984Term endedMarch 14, 2004

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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