Who we are

Since 1920, your creation has been our motivation. We have 100 years of experience in the legal protection of intellectual property of inventionstrademarks and designs for self-employed persons as well as for large multinationals in the Netherlands and abroad. In addition to our offices in the Netherlands, Germany, Belgium and Switzerland, Arnold & Siedsma has an extensive global network of agents so that we can protect your rights anywhere in the world.

Experts in patents, trademarks, design and IP rights in general

Arnold & Siedsma has more than sixty in-house technical and legal experts with knowledge of all the important innovative sectors, from biotechnology and pharmaceutics to semiconductors and software. Depending on your invention, we connect you to a patent attorney who specialises in your specific discipline. Our trademark and design attorneys are the best partners for all issues related to your trademarks or protecting the unique design of your products. Our IP attorneys at law can help you with anything related to legal procedures, such as upholding your rights.

Our work in intellectual property

Our work in intellectual property varies: from assessing innovations, formulating and obtaining patent and trademark requests, protecting patent and trademark rights in case of transgression to providing strategic and operational advice. With more than 160 employees, our office represents big and small European and foreign clients, including clients from America and Asia.

Value your idea

Perhaps you want to turn your discovery or invention into a commercial success or to interest investors or manufacturers in these ideas. Before you do, it is important to properly establish the intellectual property of your discovery or invention and protect it against imitations by competitors. In this way, you will reap the full financial benefits of your work.

Rankings

Arnold & Siedsma is proud to be ranked by three esteemed IP industry organizations: IP Stars, IAM Patent 1000, and WTR 1000. These rankings highlight our expertise across all facets of intellectual property, including the establishment of patents, trademarks, and designs, as well as leveraging and defending IP rights.

With over 100 years of experience, a team of more than sixty in-house technical and legal experts, and a global network of agents, we support clients of all sizes – from innovators to multinational corporations. Your ideas, brands, and designs will be completely safeguarded and defended globally thanks to our extensive intellectual property services.

 

IP Stars

IP Stars is the go-to guide for businesses and individuals seeking expert legal professionals in intellectual property matters. Since 1990, Managing IP has been providing in-depth coverage of IP law and practice across the globe. The IP stars rankings highlight top law firms and practitioners in various IP practice areas worldwide.

Arnold & Siedsma has been ranked in the following categories:

  • Patent prosecution: Tier 1 (NL and BE)
  • Trade mark disputes: Third place (NL)
  • Trade mark prosecution – patent & trade mark attorney firms: Tier 2 (NL)
  • Trade mark prosecution – ‘other notable firms’ (BE)

Our colleagues have been ranked in the following categories:

‘IP Star’ and ‘Top 250 women in IP’:

  • Petri van Someren
  • Nele D’Halleweyn

‘Notable practitioner’:

  • Joop Elzas
  • Martin Luten

‘IP Star’:

  • Michiel Rijsdijk
  • Remco van Leeuwen

IAM Patent

The IAM Patent 1000 highlights the firms and individuals recognized as top performers in the critical field of patent law.

Our colleagues have been ranked in the following categories:

‘Recommended – individuals: prosecution’:

  • Rogier Brouwer
  • Paul Hylarides
  • Bart Jacobs
  • Bart Laenen
  • Martin Luten
  • Youri De Groote
  • Marcel van Kooij
  • Petri van Someren
  • Remy van den Bosch

‘Highly recommended – individuals: prosecution’:

  • Nele D’Halleweyn

‘Bronze – individuals: litigation’:

  • Michiel Rijsdijk

WTR 1000

The WTR 1000 recognizes the top professionals and firms excelling in the areas of obtaining, protecting, managing, enforcing and monetizing trademarks.

Our colleagues have been ranked in the following categories:

‘Recommended – individuals: Benelux: agencies’:

  • Sandra Bauwens
  • Robbert Keij
  • Elke Stegeman

‘Highly recommended – individuals: Benelux: agencies’:

  • Joop Elzas

‘Bronze – individuals: Benelux: Netherlands’:

  • Michiel Rijsdijk

‘Gold – individuals: Benelux: Netherlands’:

  • Remco van Leeuwen

Our specialists

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