Erik Bartelds MSc.

Partner, European patent attorney, Dutch patent attorney, Belgian patent attorney

Erik Bartelds

Within Arnold & Siedsma, Erik is responsible for drafting patent applications in the fields of machinery construction, vehicle technology, agricultural machinery, artificial grass and packaging for consumer products.

Erik has extensive experience in grant procedures at the European Patent Office in the fields of aerospace engineering, general mechanics, civil engineering, vehicle technology and software. He has been involved in a large number of opposition and appeal cases, including those for a major American aircraft manufacturer.

Since 2004, the aircraft manufacturer has been faced with objections to its European patents. These have been filed by a major European competitor. Erik intervenes regularly and successfully in these opposition proceedings for the American client, who is able as a result to enforce its economically important patent portfolio in Europe.

Erik studied Aerospace Engineering at Delft University of Technology. The main areas of study were aerodynamics, aviation mechanics, control systems, propulsion systems and designs and materials.

What others say about Erik:
Quick-witted, creative, tenacious

Employment history:

1989 - present: Patent attorney at Arnold & Siedsma
1992: Dutch and European patent attorney
1997: Belgian patent attorney
1989: Delft University of Technology, Aerospace Engineering. 
Areas of study: aerodynamics, handling characteristics, control systems, propulsion and designs and materials

Dutch, English, German, French

Outside activities and memberships:
Erik is a member of the AIPPI ( and the European Patent Institute epi ( Within epi, Erik is a member of the EPO Finances Committee.
On behalf of Arnold & Siedsma, Erik is a member of De Maatschappij [The Society] ( and the Netherlands Association of Aeronautical Engineers (

Telephone: +31 24 397 85 38