Patent Yard Sign in
Expired European patentEurope

Electronic odometer

EP 0139770 B1 · Applicant: HITACHI, LTD.

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 April 20, 1984 and granted May 8, 1991. A European patent lasts at most 20 years from filing, so its term ended April 20, 2004.
  • 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 20, 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.
FiledApril 20, 1984
PublishedMay 8, 1985
GrantedMay 8, 1991
Term endedApril 20, 2004
Application numberEP 84901620
Classification (CPC)G01C22/02 +1 more

Timeline

Timeline From EPO dates

1985198719891991199319951997199920012003Application filedApril 20, 1984PublishedMay 8, 1985Patent grantedMay 8, 1991Term endedApril 20, 2004

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.