Question juridique clé
Whether 'Lernstudio' is a protectable trademark or common property.
Solution extraite
The sign 'Lernstudio' is common property and merely descriptive; trademark protection depended on proven secondary meaning.
Motifs extraits
The term is understood as a commercial institution for learning and is descriptive in at least one Swiss language region; the fact that it was registered as a well-known mark only shows that the office accepted prima facie proof, not that the sign lost its descriptive character.