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Cees Jansen

Patent attorney

“Do not give up before you have achieved your objectives.”
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Cees Jansen

  • Engineering
  • European Patent Attorney
  • Dutch Patent Attorney
  • Partner

Cees Jansen has been the Chairman of V.O. since July 2007. Cees  graduated in Physics at the Delft University of Technology. He has held the position of head of the patent department at two large technology-driven companies before he joined V.O. in 1993.  He focuses on that type of companies in his present practice.

More information about Cees

Cees has extensive expertise in high-tech systems such as radar, sonar, computer and telecommunication systems on the one hand and related mechanical systems on the other. In addition, he specializes in patent strategies to effectively protect replacement products, parts of systems and semi products. He gained vast experience in opposition proceedings and litigation, in particular infringement and nullification suits, both nationally and abroad, including the USA.

Cees is member of the Commission for Patent Attorneys in Private Practice. He is Head of the branch office in ‘s-Hertogenbosch.

Working experience

  • Patent Attorney, V.O. (1990-present)
  • Head patent department Hollandsche Signaal Apparaten (Thalis) (1986-1990) and Hunter Douglas (1990-1992)


  • MSc in Physics, Delft University of Technology (1984)


  • Technically strong and practical, Cees Jansen fronts the ‘s-Hertogenbosch office and devises pragmatic strategies for rights holders in the telecommunications and mechanics sectors (IAM Patent 1000, 2017).
  • Firm chairman Cees Jansen is well accustomed to leadership roles, having captained the patent departments of two technology companies before entering private practice. He is praised for his deep understanding of patent strategy (IAM Patent 1000, 2016).
  • On the high-technology front, chairman Cees Jansen is a good name to know. He drafts applications for many of Douwe Egberts’ top product lines (IAM Patent 1000, 2015).
  • Recognized as IP Star (2015, 2014) by Managing Intellectual Property.
  • Leading light Cees Jansen is enjoying his seventh year as chairman of the firm (IAM Patent 1000, 2014).
  • Cees Jansen is “one of the most experienced out there”. He works on both sides of the contentious and non-contentious divide, expecially in the areas of electrical engineering and information technology (IAM Patent 1000, 2013).
  • Chairman Cees Jansen has accumulated substantial experience of opposition, infringement and nullification proceedings in the Netherlands and abroad. His specialisms include sonar, telecommunications and computer systems (IAM Patent 1000, 2012).

Professional & Community Activities

  • Member of the commissions for the Dutch examination of patent attorneys


  • Dutch
  • English
  • German


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