Jeroen Cornelis

Partner since 2009

Trademark and design attorney and legal advisor

  • Trademark law
  • Design law
  • Copyright
  • Contracts
  • Collaboration agreement
  • Transfer deeds
  • Licence agreement
  • Co-existence agreement
  • Non disclosure agreement
Dutch and English

Jeroen Cornelis joined NLO in 1999. He heads one of the legal teams.



Jeroen specialises in trademark and design law, copyright and agreements. Jeroen has extensive experience in the worldwide protection of trademarks and designs, in providing strategic advice on trademarks and designs and portfolio management relating to intellectual property.



Jeroen is a registered Benelux trademark and design attorney (2001) and a European trademark and design attorney (2004). He graduated from the Faculty of Law at Groningen University (Netherlands, 1998) specialising in intellectual property. 


Member of

Jeroen is a member of the Benelux Trademark Association (BMM), the European Community Trademark Association (ECTA) and the International Trademark Association (INTA). Jeroen is also an associate member of inter alia the Asian Patent Attorneys Association (APAA).


More information

Jeroen's portfolio includes many Dutch and International multinationals and medium-sized national and international businesses. Jeroen regularly visits China and South Korea in pursuit of his duties on behalf of a number of Asian clients.

Fake invoices

Fake invoices are unfortunately a well known problem among trademark owners. A fake invoice is a misleading invoice (or letter) which reffers to a trademark, design, patent or patent application. A payment is requested for a publication in a register or to extend the validity of a registration.They use names like Worldwide database or Trademarks and Patents, Euro IP Register, International Patent & Trademark Database.


More information and examples of fake invoices


Our advice: don't pay. Please contact us is you have any doubts.

NLO Shieldmark wins Award ‘Benelux - Firm of the Year for Trade Mark Prosecution’

NLO Shieldmark is proud to have been voted ‘Benelux - Firm of the Year for Trade Mark Prosecution’ by the highly respected Managing IP magazine. The award was presented on Thursday 10 March 2016 in London.


We wish to thank our clients and fellow professionals for their positive feedback and for believing in our quality and service.