Expired European patentEurope
High-speed digital data communication system
EP 0335946 B1 · Applicant: Hughes Aircraft Company
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
Read the whole patent
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 August 19, 1988 and granted December 1, 1993. A European patent lasts at most 20 years from filing, so its term ended August 19, 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 February 19, 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.
FiledAugust 19, 1988
PublishedOctober 11, 1989
GrantedDecember 1, 1993
Term endedAugust 19, 2008
Application numberEP 88909156
Classification (CPC)H04L25/02
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.