Ms. Valborg Kjartansdóttir graduated as a lawyer from The University of Iceland in June 1984. In 1985 she started to work at Sigurjónsson & Thor and became a partner in January 1989. She is a member of FICPI, AIPPI, ECTA, Marques, Inta, The Icelandic Bar Association and an overseas member of ITMA and LES. She served on the board of The Association of Icelandic Trademark and Patent Agents as a treasurer 1989-1999, from March 2001-2002 and as a chairman from 2002 – 2007. Valborg is an European Patent Attorney and she has frequently commented on changes in the law and/or regulations relating to intellectual property.

She has lectured on Trademark Law at The University of Iceland.

Valborg Kjartansdóttir was invited to publish her profile under the section Women in law profiles published on the Chambers and Partners website in May 2012. Click here: Chambers – Valborg

Current Intelligence article published on April 22, 2014  in the Journal of Intellectual Property Law & Practice that can be accessed from the Oxford Journals. Full article can be viewed here

Chambers 2024

“The lawyers have broad experience in trade mark matters.”

“The practitioners are extremely smart, business-minded and highly knowledgeable.”

Valborg Kjartansdóttir “Valborg is responsive and reliable.”

Chambers 2023

“The lawyers have a wide knowledge of the legal systems, both locally and internationally. They are real experts. Their responsiveness is one of their top qualities.”

Valborg Kjartansdóttir is knowledgeable in trade mark registration and opposition mandates. “Valborg Kjartansdóttir has unbeatable knowledge in IP.”

WTR 1000 – The World’s Leading Trademark professionals:


Gold – Firms
Established in 1950, “Sigurjónsson & Thor is a first-rate firm for any trademark matters that arise in Iceland. It is home to exceptionally knowledgeable lawyers who are passionate and who thoroughly outline to clientele what must be done to protect their rights.” With almost four decades under his belt, “Magnús Haukur Magnússon is a prominent figure for Icelandic trademark work, bringing a practical and business-minded approach to disputes”. He leads the department alongside Valborg Kjartansdóttir, “an incredibly intelligent practitioner with in-depth knowledge of both trademark and patent law”, and who excels when handling enforcement matters. Also on deck, Magnús Hrafn Magnússon brings his expertise to start-ups and internationals alike. “A highly energetic and passionate practitioner, Magnús effectively secures optimal protection for clients.”


“Sigurjónsson & Thor is an easy recommendation – it is the place to go for trademarks in Iceland. Its professionals are reliable, transparent, hardworking and fast and they do a great job on complex cases.” “Valborg Kjartansdóttir is excellent to work with on trademark-related matters, including clearance and filing. She is easy to communicate with, very hands on and does things the right way.” She regularly works with Magnús Hrafn Magnússon, a “highly practical and swift responding lawyer” who is cited for his ability to navigate tricky oppositions and negotiations. Kjartansdóttir leads the practice alongside Magnús Haukur Magnússon, who has been a partner at the set for 25 years. These partners have extensive connections with other legal practices around the world and close direct client relationships with many foreign players, such as Volkswagen, for which Kjartansdóttir recently overcame an Icelandic trademark office rejection to secure a registration


Legal 500 World Trademark Review

Leading individual 2023

Recommended Individual 2023