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Expired European patentEurope

Authentication method, authentication system, and tag device thereof, information reference client, authentication server, and information server

EP 1850233 B1 · Applicant: FUJITSU LIMITED

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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 February 17, 2005 and granted July 5, 2017. A European patent lasts at most 20 years from filing, so its term ended February 17, 2025.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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.
FiledFebruary 17, 2005
PublishedOctober 31, 2007
GrantedJuly 5, 2017
Term endedFebruary 17, 2025
Application numberEP 05710304
Classification (CPC)H04L63/08 +2 more

Timeline

Timeline From EPO dates

2006200820102012201420162018202020222024Application filedFeb 17, 2005PublishedOct 31, 2007Patent grantedJuly 5, 2017Term endedFeb 17, 2025

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

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