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David Lesthaeghe

David Lesthaeghe

European and Belgian Patent Attorney, European Patent Litigator - De Clercq & Partners, Belgium

In 2020, 2021 and 2022, David was named Rising Star in Intellectual Property by Managing IP.

David Lesthaeghe holds a Master of Science in Engineering Physics and a PhD in Engineering from Ghent University, Belgium. He performed his research at the Center for Molecular Modeling (CMM), in collaboration with the Laboratory for Chemical Technology (LCT).

Prior to joining De Clercq & Partners, David worked for three years as a post-doctoral researcher at the same department, which included a research stay at the Unité de Catalyse et de Chimie du Solide, Université Lille 1, France. He joined De Clercq & Partners in September 2010.

David qualified as a European Patent Attorney in July 2014. In 2017, he qualified as a Belgian Patent Attorney, and was registered as a qualified representative before the French Patent Office (INPI). In 2023, he successfully obtained the University degree on Patent Litigation in Europe at the University of Strasbourg (France), qualified as a European Patent Litigator, and registered as a representative before the Unified Patent Court (UPC).

His areas of practice include:

  • Drafting, filing and prosecution of European and PCT patent applications
  • Drafting and prosecution of national patent applications
  • Oppositions and appeal proceedings before the EPO
  • IP due diligence
  • Oral proceedings before the EPO in examination, opposition, and appeal
  • Opinions regarding patentability, freedom-to-operate, infringement, and validity of intellectual property rights
  • Acting as an expert for the Belgian courts or parties in descriptive seizure proceedings
  • Acting as an expert in litigation before Belgian civil courts or parties in intellectual property matters
  • Patent literature searching and analysis
  • Portfolio management, advice, and strategy
  • General strategic and legal advice in IP matters

David regularly lectures on various aspects of intellectual property. He is a member of LES Benelux and AIPPI Belgium.

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