A reliable firm with a specialist outlook.
Advocaten and registered European Patent, Trademark & Design Attorneys. We provide legal solutions to business problems — across the Netherlands and throughout Europe.
Why our consulting
A full-service firm delivering legal solutions to business problems — not just advice on paper.
Global client insights
Rapid solutions for clients across Europe through our cooperative network and the ISW Europe Legal IP association.
Thought leadership
Comprehensive, practical strategy — so you can put your plan into action with confidence.
Full-service legal &
intellectual property
One firm for the laws that move your business — from ideas and IP to deals, property, family and disputes.
Four decades of trusted counsel
Founded as IJsseldijk, Smit & Wouters, ISW Legal IP adopts the best of the old and the new — experience, connection, confidence and value — for clients local and international.
The beginnings
IJsseldijk & Smit, Advocaten, is founded by Daan IJsseldijk in Amsterdam and Rotterdam — practising banking & real estate, family, wills, trust and succession law.
Registered IP attorney
The firm is registered as a European Patent, Trademark and Design Attorney before the BOIP and EUIPO, expanding into Intellectual Property, Information Technology and Corporate & Commercial law.
Re-branded as ISW Legal IP
Re-branded to provide holistic legal and intellectual-property services in close association with ISW Europe Legal IP — pairing legal advice with a dedicated technical and commercialisation team.
“An advocate for your rights. A trusted partner for your business. An independent advisor to your legal issues.”
Our vision — the promise behind every matter we take on.
A versatile team of specialists
Partners and associates across intellectual property, dispute resolution and corporate law.
Daan IJsseldijk
Managing Partner
Intellectual Property Department
Sanne Smit
Partner
Dispute Resolution & Arbitration
Lars Wouters
Legal Associate
Dispute Resolution & Arbitration
Eva de Vries
Legal Associate
Corporate Department
Insights from our lawyers
Plain-English legal guidance across IP, corporate, property, family and disputes.
Looking for a top specialist lawyer?
Tell us what you'd like to discuss and we'll be in touch shortly. We value long-term relationships and personalised service for every client.
Amsterdam
Gustav Mahlerlaan 10, Symphony Tower, Zuidas, 1082 PP Amsterdam, The Netherlands
+31 (0)20 240 1985
Rotterdam
Weena 690, 16th Floor, 3012 CN Rotterdam, The Netherlands
+31 (0)10 240 1985
The Hague
Bezuidenhoutseweg 12, 2594 AV Den Haag, The Netherlands
+31 (0)70 240 1985