Mr Tommy Dahlen > Arntzen de Besche > Oslo, Norway > Lawyer Profile

Arntzen de Besche
PO BOX 2734
0204 OSLO
Tommy Dahlen photo

Work Department

Intellectual property law and marketing law, Privacy and data protection, Technology and innovation


Partner. Dahlen has over 20 years’ experience of transactions and advising technology and knowledge companies, educational establishments and industrial actors. He advises national and international businesses in a number of industrial fields on matters relating the protection and commercialisation of intellectual property (IP) rights, such as patents, trademarks, designs and trade secrets.

He also assists major business enterprises and research institutes to facilitate and execute R&D projects, and has considerable experience with contract models, project execution and external framework conditions for projects fully or partly financed from public funds, typically through financing programmes managed by the Research Council of Norway, Innovation Norway and the EU’s various framework programmes.

Dahlen has previously worked as a lecturer at the Norwegian University of Science and Technology (NTNU)’s Department of Industrial Economics and Technology Management (IØT), where he was closely associated with the NTNU School of Entrepreneurship.

Dahlen has a strong understanding of business and technology, and is always up-to-date on the latest trends, methods and developments in key areas of technology, including the development and internationalisation of medical equipment, materials technology, software and electronics. He works closely with technical resources and project managements, and devotes time getting to know each client to ensure his advice is tailored to their organisational culture, operational needs and expectations.

Dahlen is a sought-after public speaker and regularly lectures at many of the largest technology conferences in Norway.


2019- Partner, Arntzen de Besche; 2019 Lawyer, OKEA; 2009-2019 Partner, Arntzen de Besche; 2006-2009 Partner, Advokatfirmaet Schjødt; 2005-2006 Chief Patenting Officer, Revolt Technology; 2002-2005 Senior Associate, Advokatfirmaet Schjødt; 1998-2001 Associate, Advokatfirmaet Schjødt


Norwegian, English


Norwegian Bar Association, LES Scandinavia


1998 Candidate in Jurisprudence, University of Oslo

Lawyer Rankings

Norway > TMT

At Arntzen de Besche, department head Andreas Nordby has expertise in dispute resolution, and provides advice to a roster of media, IT, telecoms and technology clients on contentious matters; marketing law is another core focus of Nordby’s practice. Per Kristian Ramsland and Knut Martinsen specialise in M&A and capital markets work, and Tommy Dahlen regularly assists with transactional mandates.

Norway > Intellectual property

Litigation expert Andreas Nordby heads up the practice at Arntzen de Besche, which is well known for advising clients in the technology, telecoms and energy sectors on the IP aspects of transactions, as well as contentious IP issues. The client roster also fields names from the e-commerce, life sciences, media, automotive and retail industries. Trade mark, design and patent infringement cases have been prominent in the group’s recent workload, as well as unfair competition work. Tommy Dahlen is a key contact for intellectual property rights matters, and senior lawyer Christopher Hestnes is also noted.