Expired European patentEurope
Coding device with differential pulse code modulation, associated decoding device and transmission system comprising at least such a coding or decoding device
EP 0259902 B1 · Applicant: TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES T.R.T.
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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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.
Why it's free to use
- Filed July 27, 1987 and granted April 22, 1992. A European patent lasts at most 20 years from filing, so its term ended July 27, 2007.
- 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 27, 2013.
- 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 27, 1987
PublishedMarch 16, 1988
GrantedApril 22, 1992
Term endedJuly 27, 2007
Application numberEP 87201438
Classification (CPC)H04N19/593
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.