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Expired European patentEurope

Multi-channel, parallel, matched digital-to-analog conversion method and converter, and analog drive circuit incorporating same

EP 1028530 B1 · Applicant: Hewlett-Packard Company

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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 24, 1999 and granted November 15, 2006. A European patent lasts at most 20 years from filing, so its term ended September 24, 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 March 24, 2025.
  • 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 24, 1999
PublishedAugust 16, 2000
GrantedNovember 15, 2006
Term endedSeptember 24, 2019
Application numberEP 99118863
Classification (CPC)H03M1/662

Timeline

Timeline From EPO dates

2000200220042006200820102012201420162018Application filedSep 24, 1999PublishedAug 16, 2000Patent grantedNov 15, 2006Term endedSep 24, 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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