Kernrechtsfrage
Whether 'GIPFELTREFFEN' is descriptive and lacking distinctiveness for 'organization and arrangement of assemblies, congresses'.
Extrahierter Entscheid
Yes. For those services the sign is immediately understood as a meeting of responsible persons and directly describes the nature of the services.
Extrahierte Begründung
The relevant public would perceive no ambiguity or fanciful meaning. Additional possible meanings do not remove the descriptive character when the primary descriptive sense is obvious.