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European application, no grantEurope

Demodulator circuit for ask modulated wave

EP 0955751 A2 · Applicant: ALPS ELECTRIC CO., LTD.

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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 April 21, 1999 and never granted as a European patent. Had it been granted, its 20-year term would have ended April 21, 2019.
  • 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 October 21, 2024.
  • 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.
FiledApril 21, 1999
PublishedNovember 10, 1999
GrantedNever granted
Term endedApril 21, 2019
Application numberEP 99303102
Classification (CPC)H04L27/06

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedApril 21, 1999PublishedNov 10, 1999Term endedApril 21, 2019

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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