Sigurjónsson & Thor

Sigurjónsson & Thor was established in 1950. The firm’s partners are Valborg Kjartansdóttir, Magnús Haukur Magnússon and Magnús Hrafn Magnússon.


Ms Kjartansdóttir graduated as a lawyer from the University of Iceland in June 1984. She joined Sigurjónsson & Thor in 1985 and became a partner in January 1989. She is a member of the International Federation of Intellectual Property Attorneys (FICPI), the International Association for the Protection of Intellectual Property, the European Communities Trademark Association, the International Trademark Association and the Icelandic Bar Association, and an overseas member of the Institute of Trademark Attorneys and the Licensing Executives Society. She served on the board of the Association of Icelandic Trademark and Patent Agents as treasurer (1989-1999 and March 2001-2002) and as chair (2002-2007). Ms Kjartansdóttir is a European patent attorney and has frequently commented on changes in Icelandic IP law and regulations. She has lectured on trademark law at the University of Iceland.

Magnús Haukur Magnússon graduated from the University of Iceland in June 1984 and has practised as a lawyer since 1985. He joined Sigurjónsson & Thor as a partner in 1997. He is a member of the FICPI and the Icelandic Bar Association, and became a Supreme Court attorney in November 1996. Mr Magnússon is a European patent attorney and a member of the Association of Icelandic Trademark and Patent Agents, and has served on the association’s board since 2007. He also served on the Board of Appeal in Competition Matters (1999-2000).

Magnús Hrafn Magnússon is a Supreme Court attorney and a partner at Sigurjónsson & Thor. Mr Hrafn is an experienced litigator and has valuable experience in representing trademark owners and others at all stages of prosecution and litigation, including the courts at district and appellate level. He provides services in relation to trademarks to a wide selection of companies, domestic and foreign, ranging from start-ups to international corporations. Mr Hrafn advises on both contentious and non-contentious IP matters. He has experience in cross-border transactions and the drafting of commercial contracts in Icelandic and English. Mr Hrafn further counsels in the field of copyright law and entertainment law, and routinely provides advice to Icelandic artists in commercial matters, as well as infringement cases. He further assists production companies involved in local and international work. Mr Hrafn has lectured in trademark and contract law at the University of Iceland and currently serves as an adjunct professor at the University of Reykjavík where he teaches specialist areas of company law.

The firm specialises in intellectual property, copyright and unfair competition, and provides IP protection services including representation before the Patent Office, the Board of Appeal, other authorities and the courts. Legal advice and representation before the authorities and the courts in all areas of industrial property law (including patents) and unfair competition law are an important part of the firm’s services. A high percentage of the firm’s clients are foreign companies seeking IP assistance in Iceland. Clients come from all business sectors, including pharmaceuticals, food and beverages, finance and fashion. The firm also cooperates with law firms in other countries and represents both domestic and international clients from Europe, the United States and Asia. The firm also represents clients from Iceland – both companies and individuals.

The firm’s staff includes professionals with extensive experience of trademark work who provide services from the very first stages of legal advice, including trademark searches and opinions, to advice on protection strategies and defences against breach of trademark rights. The firm’s attorneys have extensive litigation experience before all levels of the Icelandic courts. The firm continues to offer legal advice in relation to the filing and prosecution of patent applications, but the main part of its practice relates to trademarks and unfair competition.

Our work

Examples of previous work include various cases before the district court and the Supreme Court, and before the Board of Appeal for trademark matters. The firm has been successfully involved in cases before the Board of Appeal.

Contact details

Sigurjónsson & Thor
Lágmuli 7
Reykjavik 108

Professional contacts

Sample client list

  • Apple
  • AUDI
  • Facebook
  • FIFA
  • Ford
  • Henkel
  • PepsiCo
  • Siemens
  • Tesla
  • VISA

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