Patent Yard Sign in
Expired European patentEurope

Battery feed circuit for a telephone subscriber line

EP 0116767 B1 · Applicant: FUJITSU LIMITED

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 December 16, 1983 and granted September 7, 1988. A European patent lasts at most 20 years from filing, so its term ended December 16, 2003.
  • 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 June 16, 2009.
  • 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.
FiledDecember 16, 1983
PublishedAugust 29, 1984
GrantedSeptember 7, 1988
Term endedDecember 16, 2003
Application numberEP 83307671
Classification (CPC)H04M19/001 +1 more

Timeline

Timeline From EPO dates

1984198619881990199219941996199820002002Application filedDec 16, 1983PublishedAug 29, 1984Patent grantedSep 7, 1988Term endedDec 16, 2003

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.