Leo Jessen

Partner at VO Patents & Trademarks

Leo Jessen started his career as a patent attorney in 1992 with VO Patents & Trademarks. He studied industrial design engineering and, after passing his attorney exams, studied law.

Mr Jessen’s clients operate mainly in the field of mechanical engineering. He specialises in consumer products, medical appliances and ergonomics.

Mr Jessen helps clients to define their IP strategy and, where appropriate, file, prosecute and defend their IP rights worldwide. This also includes challenging third-party rights, licensing and conducting freedom-to-operate analysis. Mr Jessen has a wide experience in patent cases before the court in The Hague and the EPO.

Mr Jessen is actively involved in the training of new patent attorneys in Dutch, European and international patent practice. Further, he is chair of the IP enforcement and Litigation Group of the International Federation of Intellectual Property Attorneys.

Previous testimonials for Mr Jessen include the following:

  • “Heineken is one of the big names that engage Leo Jessen for his drafting and prosecution talents” (IAM Patent 1000 2017).
  • “A key reference for companies in the consumer products sector, Leo Jessen has recently been advising Heineken on the expansion of its patent portfolio” (IAM Patent 1000 2016).

Professional associations


Firm details

VO Patents & Trademarks
Carnegieplein 5
The Hague 2517

Contact details

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