Yes, a music tune can be registered as a sound trademark. However, strict rules apply. The trademark application must include the musical staff, notes, any keys (e.g., C key, F key), rests (e.g., whole, half, quarter), and other musical symbols that indicate the melody line. At the European Union Intellectual Property Office (EUIPO), an electronic audio file of the music fragment can also be submitted. An example of a sound trademark is Für Elise.