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Expired European patentEurope

Acoustic touch position sensor with first order lamb wave reflective arrays

EP 0557446 B1 · Applicant: EXZEC INC.

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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 November 14, 1991 and granted February 4, 1998. A European patent lasts at most 20 years from filing, so its term ended November 14, 2011.
  • 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 May 14, 2017.
  • 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.
FiledNovember 14, 1991
PublishedSeptember 1, 1993
GrantedFebruary 4, 1998
Term endedNovember 14, 2011
Application numberEP 92901190
Classification (CPC)G06F3/0436

Timeline

Timeline From EPO dates

1992199419961998200020022004200620082010Application filedNov 14, 1991PublishedSep 1, 1993Patent grantedFeb 4, 1998Term endedNov 14, 2011

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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