Sixième Son Communication is a French communication agency specialising in audio branding and sound design. Sixième Son owns the trade mark Sixième Son, registered inter alia for advertising and sound production services. The French company Dissonances also operates as a communication agency focusing on sound creation. Dissonances registered the keywords "sixième son" and "sixiemeson" via Google's paid referencing service AdWords. Following a Google search, these keywords generated sponsored links titled "Sixième son – dissonances.fr" with the commercial tagline "Des musiques originales pour enrichir votre communication" ("original music to boost your communication") and redirected to Dissonances' website www.dissonances.fr. These findings led Sixième Son to sue Dissonances on the basis of trade mark infringement and unfair competition.