Klaus-Jürgen is the former head of the Bird & Bird’s Trade Mark Group in Germany. He is a member of the Bird & Bird international Intellectual Property Group as well as a member of the Bird & Bird EU & Competition Law Group.

Klaus-Jürgen’s work in trade mark matters focusses on the development of trade mark strategies and the enforcement of trade marks. He is one of the most well-known trade mark lawyers in Germany with more than 30 years experience and has garnered particular respect for his work for Deutsche Telekom AG. In addition to trade mark law, Klaus-Jürgen also practices EU & Competition and intellectual property law. Klaus-Jürgen's expertise is recognised by some of the leading independent legal directories: In the 9th Edition of “Global Counsel 3000” he was named as one of only two “leading individuals” in trade mark law in Germany; in the “Which Lawyer Handbook 2009” of PLC he is mentioned as a “highly recommended individual”; in the 2008/2009 edition of the “JUVE Handbook” he is named as a “widely recognised IP expert” and as a “highly recommended attorney” (“good lawyer”, “very respected”) in the fields of trademark and design protection. In addition, he is a leading adviser in EU law, unfair competition and cartel law in Germany. Klaus-Jürgen has advised numerous companies before courts and national and EU anti-trust authorities concerning merger and anti-trust cases as well as cases on the abuse of dominant market positions.

For many years, Klaus-Jürgen has been the chairman of the largest regional section of the German Association for the Protection of Intellectual Property (Deutsche Vereinigung für Gewerblichen Rechtsschutz und Urheberrecht, GRUR) and a member of the GRUR Board of Directors. Klaus-Jürgen was an officer of Committee L (Intellectual Property, Copyright & Entertainment) of the International Bar Association (IBA) for eight years, co-chairing it from 1998 to 2002.

In addition to his work as a lawyer, Klaus-Jürgen has published numerous articles on trade mark, copyright, design protection and competition law.