Tanguy de Haan

• Citroën in pan-European injunction proceedings against the use of Polestar’s double chevron logo;
• Glaxo Group in defending its EU trade mark registration for a three-dimensional purple inhaler before the EU General Court of Justice and the CJEU;
• Guerlain's registration of its iconic 3D shape mark for lipstick;
• Hypertherm in design proceedings before the General Court of the EU about the protection of consumables and potentially captive markets by designs;
• Levi Strauss & Co. on the enforcement of its rights on the "Arcuate" trade mark in the EU;
• Louis Vuitton in trade mark infringement and claim back proceedings before the Brussels Business Court and the Benelux Office for IP in relation to the second largest diamond of the world; and
• Reckitt Benckiser in the defence of one of its key trade marks, disparaged in comparative advertising by Lidl.

Widely recognised for the quality of his work, Tanguy de Haan is ranked by several independent legal research and ranking companies.

The Legal 500, 2025

‘Tanguy de Haan consistently impresses with his depth of expertise, responsiveness, and proactive approach. What sets Tanguy apart is his commitment to understanding not just the legal nuances, but also the commercial and strategic objectives of our global business. This holistic approach ensures that his advice is always pragmatic and aligned with our long-term goals.’

‘Tanguy de Haan leads the team for us. He is fluent in comparative U.S. principles and excellent at describing the substantive law and how we might succeed in various matters. He refrains from any undue deference to the ideas of outside lawyers or clients, but does so gracefully and with cogent explanations.’

‘Tanguy's ability to distill complex legal matters into clear, actionable advice is invaluable. I’ve particularly appreciated his willingness to go the extra mile, and his team's ability to proactively and independently manage complex evidence gathering exercises for our cases spanning 10+ years (and still going).’

Chambers Europe 2025

‘Everything he told us in advance happened!’

‘Tanguy de Haan is a knowledgeable lawyer with a broad focus.’

Included in IAM Global Leaders 2025 list (patents)

World Trademark Review 2024

‘Tanguy is an excellent professional with a thorough understanding of complex matters, and he delivers favourable results.’

IAM Patent 1000, 2024

Tanguy de Haan is an “experienced, top-class IP litigator, with vast and deep experience”. Whether before a Belgian court or the European Court of Justice, he stands out because of his “new and creative approaches” and is admired for his strong ability to “bridge legal analysis and commercial interest for clients”.

Managing Intellectual Property IP Stars - Trade mark star 2024

Tanguy is a Board Member of the Benelux Trademarks and Designs Association (BMM), member of the Benelux Council for Intellectual Property, co-chair of the editorial committee of the French IP association APRAM, and a member of European Patent Lawyers (EPLAW) and the European Amicus Curiae committee of the International Trademark Association (INTA). He publishes and lectures frequently on IP-related topics and strategies.

Tanguy received his law degree magna cum laude from the Université catholique de Louvain (UCL) in 2000. He is admitted to the Brussels bar and joined NautaDutilh in 2000. In 2013, Tanguy participated in the Harvard Business School’s IP Strategy Programme.