Expired European patentEurope
Input-output interface device between a data switcher and a plurality of transmission lines
EP 0011540 B1 · Applicant: Etablissement Public de Diffusion dit "Télédiffusion de France"
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 October 31, 1979 and granted August 10, 1983. A European patent lasts at most 20 years from filing, so its term ended October 31, 1999.
- 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 May 1, 2005.
- 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 31, 1979
PublishedMay 28, 1980
GrantedAugust 10, 1983
Term endedOctober 31, 1999
Application numberEP 79400816
Classification (CPC)H04L12/56
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.