Patent Yard Sign in
Expired European patentEurope

Audibility enhancement

EP 1599992 B1 · Applicant: Telefonaktiebolaget L M Ericsson (Publ)

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.

Why it's free to use

  • Filed February 25, 2004 and granted January 13, 2010. A European patent lasts at most 20 years from filing, so its term ended February 25, 2024.
  • Supplementary protection certificates extend only medicine and crop-protection patents, and it isn't classified as either.
  • 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 25, 2004
PublishedNovember 30, 2005
GrantedJanuary 13, 2010
Term endedFebruary 25, 2024
Application numberEP 04714539
Classification (CPC)H04M9/08 +2 more

Timeline

Timeline From EPO dates

2005200720092011201320152017201920212023Application filedFeb 25, 2004PublishedNov 30, 2005Patent grantedJan 13, 2010Term endedFeb 25, 2024

Sources & verification