Mathias Zimmer-Goertz

Philipp-Gerald Hammes is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Philipp-Gerald, who practices law in Düsseldorf, Germany, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Philipp-Gerald is held by other top lawyers in the same geographic and legal practice area.

Dr. Kai Rüting is attorney since 2005 and partner of the firm since 2015. He advises clients in patent infringement litigation, technology-related arbitrations, and licensing matters. He specializes in national and cross-border patent litigation. Kai has comprehensive litigation experience, in particular in the areas of standard-related patents, electronics, medical technology, chemistry and life sciences. He also has broad experience advising international clients on strategies relating...

Dr. Christian Sandweg joined the firm of VOSSIUS in 2011 and was admitted to practice as a German Patent Attorney (Patentanwalt) and European Patent Attorney in 2015. His training in IP included stages at the German Patent Office, the Federal German Patent Court and the Lower District Court Mannheim. In 2016, he became a partner in the firm. Dr. Sandweg studied physics at the Technical University of Munich and the University of Kaiserslautern, specializing in solid state physics and in partic...

Lawyer Partner

Jochen Lehmann is a top attorney recognized by Best Lawyers in the practice area(s) of Arbitration and Mediation. Jochen, who practices law in Cologne, Germany, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jochen is held by other top lawyers in the same geographic and legal practice area.

Hermann Kahlhöfer advises clients in patent law, in particular in the fields of electrical engineering, medical technology and physics. He has been working in the field of intellectual property for more than 40 years and has extensive experience in the field of national and international patent prosecution procedures and patent infringement matters as well as in the development and exploitation of intellectual property portfolios. After completing two years of military service with a spe...

Lawyer, Accredited Specialist for Public Procurement Law Partner

Helmut Balthasar is a top attorney recognized by Best Lawyers in the practice area(s) of Restructuring and Insolvency Law. Helmut, who practices law in Cologne, Germany, has been recognized since 2010. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Helmut is held by other top lawyers in the same geographic and legal practice area.

Lutz Martin Keppeler is a top attorney recognized by Best Lawyers in the practice area(s) of Data Security and Privacy Law and Information Technology Law. Lutz Martin, who practices law in Cologne, Germany, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Lutz Martin is held by other top lawyers in the same geographic and legal practice area.

Christoph Niemeyer is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law. Christoph, who practices law in Cologne, Germany, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Christoph is held by other top lawyers in the same geographic and legal practice area.