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‘Nowadays, patenting has become the essential ingredient, since creative entrepreneurship and innovative technology do not suffice anymore to generate long-lasting profitable business in the highly competitive information society of today.’
Karel de Jong

Karel de Jong

  • Engineering
  • European and Dutch Patent Attorney, European Patent Litigator
  • Associate

Prior to joining V.O. in 2002 as a patent attorney, Karel de Jong had first been a scientist for five years, and an entrepreneur for another ten years. As an entrepreneur, Karel gained experience in commercialising patented technology. Karel is a mechanical engineer. He obtained his Master’s degree in 1987 and a PhD degree in 1991.

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Today, as patent attorney at V.O., Karel is involved in various fields of technology, such as building and construction, machinery, vehicles, energy production, shipbuilding, offshore, rapid prototyping, medical devices, packaging, food processing, domestic devices and appliances.

Karel works for a variety of clients, ranging from small and medium sized enterprises, to large companies, universities and research institutes. Whether it involves patenting trajectories all over the world, defending his clients against alleged patent infringement, or assisting his clients in other ways, Karel always aims at delivering quality. Not as a theorist, but with a practical focus on his client’s interests.

In his capacity as European Patent Litigator, Karel is allowed to act as UPC representative.

Working experience

  • Patent Attorney, V.O. (2002-present)
  • Managing director/owner at GPT B.V. (1992-2002)
  • Scientist at Technology Consultancy Center (1987-1992)

Education

  • PhD in Mathematics and Natural Sciences, University of Groningen (1991)
  • MSc in Technical Mechanics/Applied Mathematics, University of Groningen (1987)

Professional & Community Activities

  • Member of the Training & Examination Committee, Dutch Platform of Formalities Officers (2012-present)

Languages

  • English
  • Dutch

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News

Trade secrets: the importance of discretion

Annelies de Bosch Kemper-de Hilster, Head of Legal at V.O., explains why trade secrets play an important role within organizations.Continue reading

T 873/24 and the reach of G 1/24 claim interpretation in added-matter analysis (Board of Appeal 3.3.05) 

In T 873/24 (Board of Appeal 3.3.05, oral proceedings 3 February 2026), the Board indicated that it would refer questions to the Enlarged Board of Appeal (EBA) on whether (and how) the Enlarged Board’s claim-interpretation guidance in G 1/24 extends to the assessment of added subject-matter under Article 123(2) EPC (and, by implication, Article 76(1) […]Continue reading

Düsseldorf Local Division adopts The Hague’s four-step test for infringement by equivalence and applies a structured “feature-by-feature function” analysis 

In its decision in Wonderland v Cybex (UPC_CFI_807/2024 and UPC_CFI_334/2025, Local Division Düsseldorf, 27 May 2026), the Düsseldorf panel addressed — in detail — the assessment of patent infringement by equivalent means under Art. 69 EPC and the Protocol.Continue reading