Rogier Brouwer

Partner at Arnold & Siedsma
Ranked in Netherlands
IAM Research

The Patent 1000 focuses exclusively on patent practice and has firmly established itself as the definitive 'go-to' resource for those seeking world-class legal patent expertise.

Recommended - Individuals: prosecution

Arnold & Siedsma has been providing ironclad IP protection for over a century, and the firm today employs 156 experts operating out of 12 offices in the Netherlands, Belgium and Germany. In Amsterdam the team thrive in the computer science, electrical engineering, mechanical engineering and physics arenas, and has several instructions keeping them occupied. Arjen Hooiveld and Martin Luten act as the European representatives for Japanese manufacturer NSK Ltd. Hooiveld frequently counsels Japanese companies with their European patents, and “Martin is hands-on and strategically strong, ensuring the best results”. Joining them in the guide this year is IAM Patent 1000 newcomer Marten Bosma, who understands the business criticality of patents, thanks to his time spent in-house as a scientific researcher and business developer. Bart Jacobs and Paul Hylarides have been assisting Samsung with regard to several of their business units; Jacobs has an excellent ability to translate technical inventions into commercially viable products, and Hylarides teamed up with fellow Eindhoven-based partner Rogier Brouwer to support Dredging International NV and its associated companies with everything from invention harvesting and searches to freedom-to-operate advice and oppositions. The team also has a solid life sciences offering, where Petri van Someren and Marcel van Kooij shine. Van Someren is a seasoned practitioner with immense expertise in biotechnology and van Kooij is not only a reference for prosecution services but also for licensing agreements. Holding down the fort on the contentious side is Michiel Rijsdijk, an eloquent and compelling advocate with a profound ability to enhance the value of his clients’ intangible assets.

Rogier Brouwer's Profile

Rogier Brouwer is a European patent attorney and partner at Arnold & Siedsma. He is a civil engineer and graduated with a degree in applied sciences from Vrije University, Brussels. The service he offers to customers is based on extensive experience acquired in industrial and academic surroundings. Until recently, Mr Brouwer lectured in material science at the Vrije University, Brussels. Over a period of 20 years, he combined his teaching role with various research and development-related management positions at chemicals group DSM, where he also completed his studies as a patent attorney. Before becoming a partner at Arnold & Siedsma, Mr Brouwer worked as an independent patent attorney for patent offices in Belgium and the Netherlands.

Mr Brouwer knows the ins and outs of the industrial sector, is able to consider customer needs and can approach issues from a variety of angles. As industrial attorney, he has considerable experience defending patents in opposition and appeal proceedings at the EPO, and is very well versed in the strategic issues surrounding intellectual property. As an independent attorney, he is able to realise tangible results for his clients by listening, reacting quickly and effectively and using his extensive technical and conceptual knowledge to propose solutions.

Firm Profile

Arnold & Siedsma is an all-round service provider for the protection of intellectual property. Since 1920 your creations have been our motivation. We have 100 years of experience in the legal protection of intellectual property of inventions, trademarks and designs for individuals 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.

Arnold & Siedsma has more than 60 in-house technical and legal experts with knowledge of all the key innovative sectors, from biotechnology and pharmaceuticals to semiconductors and software. Each client is assigned a patent attorney who specialises in the relevant, 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 enforcing your rights.

ISO 9001 certified

For the past 100 years, we have been a reliable partner for our clients with regard to all IP issues. In 2015 we became the first large Dutch IP agency with foreign offices to be ISO 9001 certified. This certification is valid for all our offices in the Netherlands and abroad. We are proud of our ISO 9001 certification because it represents what our firm stands for: say what you do, do what you say, prove it.


At Arnold & Siedsma we believe in customised work and this can be seen in the way we operate. You can count on our personal attention, a fixed account manager and a regional office in your area.

The lines of communication with our specialists are short and personal. Service is our top priority. We stay in close touch with our clients so that we can provide you with a fast and responsive service. With offices throughout the Netherlands and Belgium, our specialists are always within proximity. At Arnold & Siedsma you will be assigned one or two dedicated account manager(s). The long-term relationship ensures that they know your business and strategy, which in turn means that they will be able to give you the correct advice for your business, in line with your multi-annual planning. Your account manager will maintain regular contact with you. The protection of your innovation is of great economic value, but can also be costly. This is why, at Arnold & Siedsma, we attach great importance to clear communication before, during and after each procedure.

Because we are a full-service provider, we have in-house specialists from all IP disciplines. Our patent attorneys, trademark and design attorneys and lawyers work closely together. We can pull together a team from several disciplines for our clients so that problems and issues are communicated between the different disciplines quickly, seamlessly and without unnecessary costs. Arnold & Siedsma is uniquely positioned as a service provider in the Netherlands thanks to this team-based approach.


Our patent attorneys have years of experience in supporting companies in various sectors and are therefore up to date with developments in your discipline. This technical knowledge and experience guarantee the optimisation of your rights. The main sectors in which Arnold & Siedsma is active are chemistry and pharmacy, electrical engineering and physics, mechanical engineering, biotechnology and food, materials and software. Our experienced specialists can assist you with the protection of your intellectual property in these sectors.


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