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Expired European patentEurope

Differential pulse code modulation transmission system

EP 0107239 B1 · Applicant: Philips Electronics N.V.

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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 10, 1983 and granted March 5, 1986. A European patent lasts at most 20 years from filing, so its term ended October 10, 2003.
  • 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 10, 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.
FiledOctober 10, 1983
PublishedMay 2, 1984
GrantedMarch 5, 1986
Term endedOctober 10, 2003
Application numberEP 83201450
Classification (CPC)H04N19/593

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedOct 10, 1983PublishedMay 2, 1984Patent grantedMarch 5, 1986Term endedOct 10, 2003

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.