Patent Yard Sign in
Expired European patentEurope

Differential transimpedance amplifier

EP 0579751 B1 · Applicant: BELL COMMUNICATIONS RESEARCH, INC.

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 February 5, 1992 and granted June 27, 2001. A European patent lasts at most 20 years from filing, so its term ended February 5, 2012.
  • 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 August 5, 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.
FiledFebruary 5, 1992
PublishedJanuary 26, 1994
GrantedJune 27, 2001
Term endedFebruary 5, 2012
Application numberEP 92910687
Classification (CPC)H03F3/45394 +1 more

Timeline

Timeline From EPO dates

1993199519971999200120032005200720092011Application filedFeb 5, 1992PublishedJan 26, 1994Patent grantedJune 27, 2001Term endedFeb 5, 2012

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.