Håmsø Patentbyrå is an IP firm that is recommended for prosecution, filing and representation in administrative proceedings in Scandinavia and the EU. The firm is in Rogaland, and duly specialises in gas technology and aquaculture patents. Its attorneys also have expertise in renewable energy, nanotechnology, engineering and mechanics.
Managing director and patent star Krister Mangersnes leads the patent department. Other notable practitioners are European patent attorneys Steven van Dijk, Richard Weaver, Kjell Arne Hoff and Arnfinn Meihack. Reidun Rosså Korsberg is the manager of the trade mark and designs team.
2024/2025
"Andy Caulfield of Hamso is a skilled and reliable attorney. Above that he is a nice and pleasant person to work with."
"They provided excellent work product and are great to work with. I trust them with my client’s matters. They are responsive and they provide excellent solutions to difficult problems."
"Very professional and friendly team."
"We chose them due to their well-reputed team, experience within the relevant technology field and success in similar cases. They are easy to cooperate with, understand the technical and legal aspects of the case, provide effective and strategic advice and are highly skilled within the relevant technology field."
"Håmsø is our preferred partner, due to their outstanding performance. Especially notable are Krister Mangersnes, Richard Weaver, Steven van Dijk and Andy Caulfield. We admire their in-depth expertise on both patent law technical aspects and strategy."
Andy Caulfield
"Very good analytical skills. Always seeks to achieve the best result for the client."
Krister Mangersnes
"Krister is an excellent communicator and he grasps and solves very difficult issues."
"Krister Mangersnes is a highly skilled patent attorney, he is solution-oriented, he handles clients in a trustworthy manner, and is a strategic partner for both lawyers and clients."
"Krister is excellent. He provides highly valuable assistance and has a deep understanding of patent law both on a European and Norwegian level. Krister is a real star in the IP world."
2023 testimonials
"They have a good technical understanding. So far all patents we have filed through Håmsø have been approved. "
"They have very good technical insight. Trustworthy."
"The most important aspect is the quality of the work of our team, but also we value that they are service-minded, respond quickly to our inquiries, and we have good communication and room for discussions."
"They are flexible and easy to work with."
"They are a great team and we trust them 100%. They provide a very good service and the price level is also fairly reasonable. "
"They give good service and are easily available when we need them. Very forthcoming and skilled team."
"We have a friendly and open professional relationship. They keep track of all our annual fees and deadlines in a very orderly way. Their officers are well skilled and have a very good understanding for the technical details regarding our patents."
"They are available and well organised."
"They have good knowledge about patent law and good knowledge on my company's area of business."
"I appreciate that they know us, and we know them."
"They are responsive, proactive, and extremely knowledgeable regarding patent practice in Europe."
"The team is responsive and knowledgeable."
"We appreciate their promptness and they are responsive and cost-effective."
2022 testimonials
"We use them because of their quality and competence."
"A very service-minded and efficient firm that does not oversell its services."
The firm acted for the patent applicant, Seabox, in a case before the EPO influencing parallel cross-border cases with formative commercial impact for the client. Litigation support was provided in a further case for the chemical industry. Patent attorney Jakob Arborelius left the firm in October 2021.