Patent Yard Sign in
Expired European patentEurope

Converter wherein a piezoelectric transformer input signal is frequency modulated by a pulse width modulated signal

EP 0758159 B1 · Applicant: NEC CORPORATION

EPO PDF

Overview

The published document from the EPO: abstract, claims, description and drawings. Open it full size

Read the whole patent

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.

Google PatentsEPO PDF

Why it's free to use

  • Filed August 1, 1996 and granted April 10, 2002. A European patent lasts at most 20 years from filing, so its term ended August 1, 2016.
  • 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 February 1, 2022.
  • 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.
FiledAugust 1, 1996
PublishedFebruary 12, 1997
GrantedApril 10, 2002
Term endedAugust 1, 2016
Application numberEP 96112452
Classification (CPC)H02M11/00 +2 more

Timeline

Timeline From EPO dates

1997199920012003200520072009201120132015Application filedAug 1, 1996PublishedFeb 12, 1997Patent grantedApril 10, 2002Term endedAug 1, 2016

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.