Expired European patentEurope
Data processing system comprising a common bus communication system in which the width of the address field is greater than the number of lines on the bus
EP 0020908 B1 · Applicant: International Business Machines Corporation
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 April 18, 1980 and granted November 16, 1983. A European patent lasts at most 20 years from filing, so its term ended April 18, 2000.
- 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 October 18, 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.
FiledApril 18, 1980
PublishedJanuary 7, 1981
GrantedNovember 16, 1983
Term endedApril 18, 2000
Application numberEP 80102080
Classification (CPC)G06F12/0215 +1 more
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.