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Expired European patentEurope

Trigger holdoff system for a digital oscilloscope

EP 0174151 B1 · Applicant: TEKTRONIX, 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 August 27, 1985 and granted July 11, 1990. A European patent lasts at most 20 years from filing, so its term ended August 27, 2005.
  • 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 27, 2011.
  • 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 27, 1985
PublishedMarch 12, 1986
GrantedJuly 11, 1990
Term endedAugust 27, 2005
Application numberEP 85306074
Classification (CPC)H03K3/023 +1 more

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedAug 27, 1985PublishedMarch 12, 1986Patent grantedJuly 11, 1990Term endedAug 27, 2005

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.