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Intellectual Property and Marketing Law

Thommessen has one of Norway’s largest intellectual property law teams, and assists Norwegian and international clients with advice and dispute resolution in matters relating to patents and trademarks, copyrights, marketing law and the protection of trade secrets.

Intellectual property right protection is a cornerstone of international trade, and intellectual property right values increase in parallel with the intensification of business competition. Our lawyers provide clear and practical advice to a range of industries in a complex and challenging field of law.

We have extensive dispute resolution experience, and have been involved in multi-jurisdiction patent disputes, litigation on fundamental copyright and trademark law issues, as well as disputes concerning the misuse of trade secrets. We often assist proprietors with the enforcement of own rights, the protection of trade secrets and the assessment of third-party rights. On a daily basis we advise major Norwegian and international players on intellectual property law issues in transactions, and we also assist and resolve disputes concerning unfair competition, product copying consumer legislation and other marketing law issues.

We understand the strategic and commercial needs of our clients, and tailor our advice accordingly. Many instructions involve high-value assets and span several jurisdictions. We are keenly aware of the importance of project management and close cooperation with the client. We use simple digital project management and document processing tools to improve workflow efficiency and ensure involvement, transparency and predictability for clients.

The lawyers are very experienced, see the whole picture and provide creative solutions. Client
Chambers Global, 2024


  • 2024 Band 1 Intellectual Property Chambers & Partners
  • 2024 Gold Band Enforcement and litigation WTR 1000
  • 2024 Tier 1 Intellectual Property Legal 500
  • 2023 Gold Band Litigation and transaction IAM Patents 1000
  • 2023 Tier 1 Patent disputes IP Stars
  • 2023 Tier 1 Trademark disputes IP Stars
  • 2023 Tier 1 Copyright & related rights IP Stars
  • 2023 2nd place Intellectual Property Prospera
  • 2023 Practitioner of the Year Norway Managing IP Awards
  • 2022 Norwegian Patent contentious firm of the year Managing IP Awards
  • 2020 Norwegian Patent contentious firm of the year Managing IP Awards

The team