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Expired European patentEurope

Tag privacy protecting method, tag device, backend device, updating device, update requesting device, programs for these devices, and recording medium storing these programs

EP 1669877 B1 · Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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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 September 27, 2004 and granted November 15, 2017. A European patent lasts at most 20 years from filing, so its term ended September 27, 2024.
  • 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.
FiledSeptember 27, 2004
PublishedJune 14, 2006
GrantedNovember 15, 2017
Term endedSeptember 27, 2024
Application numberEP 04788209
Classification (CPC)G06F21/62 +2 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedSep 27, 2004PublishedJune 14, 2006Patent grantedNov 15, 2017Term endedSep 27, 2024

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.