IPPT2
TRADEMARK LAW
Use of trade marks as keywords in search engine advertising service:
• Proprietor is entitled to prohibit in the case where that ad does not enable an average internet user, or enables that user only with difficulty, to as-certain whether the goods or services referred to therein originate from the proprietor of the trade mark or an undertaking economically connected to it or, on the contrary, originate from a third party.