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Expired European patentEurope

Personal identification encryptor system with error-correcting code and method

EP 0397664 B1 · Applicant: TANDEM COMPUTERS INCORPORATED

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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 27, 1988 and granted January 7, 1998. A European patent lasts at most 20 years from filing, so its term ended October 27, 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 April 27, 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.
FiledOctober 27, 1988
PublishedNovember 22, 1990
GrantedJanuary 7, 1998
Term endedOctober 27, 2008
Application numberEP 88910324
Classification (CPC)G09C1/04 +1 more

Timeline

Timeline From EPO dates

1989199119931995199719992001200320052007Application filedOct 27, 1988PublishedNov 22, 1990Patent grantedJan 7, 1998Term endedOct 27, 2008

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.