The following shall give rise to trade mark protection:
1. the entry of a sign as a trade mark in the Register kept by the German Patent and Trade Mark Office;
2. the use of a sign in trade in so far as the sign has acquired public recognition as a trade mark within the affected trade circles; or
3. a trade mark constituting a well-known mark within the meaning of Article 6bis of the Paris Convention for the Protection of Industrial Property (Paris Convention).