Legal advice and representation before the courts in all fields of Intellectual property. We provide advice concerning choice of trademark, file trademark applications nationally and abroad, file international applications – Madrid Protocol, renew marks, review and evaluate trademark portfolios, represent clients in all matters before the Patent Office, the Board of Appeal and other authorities such as regarding provisional refusal.

CHAMBERS 2009 – 2015.


What the team is known for

Excellent IP boutique offering focused expertise on trade mark applications and prosecutions, regularly acting for foreign or international clients on alleged infringements in Iceland. Offers its clients a service covering all stages of registering and protecting rights, from evaluation of IP to representation before the authorities in disputed cases.

Strengths (Quotes mainly from clients)

“Promptly responds to our requests for information, diligently handles our Iceland-related matters and achieves excellent results.”

“The team is down to earth and just easy to work with. When the lawyers are running cases, their modesty and humble nature means judges respect them and their approach, which really helps.”


What the team is known for Best known for its expertise in trade mark and patent registration. Clients include international household names in the social media, pharmaceutical and automotive industries.

Strengths (Quotes mainly from clients)

The lawyers work well as a team and communicate excellently.


Sources say: Extremely responsive and impressive from a technical point of view.” “Switched-on in terms of highlighting local legal issues to international clients.

KEY INDIVIDUALS Magnús Haukur Magnússon is a well-respected litigator. Interviewees praise his knowledge, experience and responsiveness and confirm his position as a leading market player.

Clients enjoy working with Valborg Kjartansdóttir and admire her know-how and dedication. She has particular expertise regarding trade marks and domain names.


Sources say: “The team always offers efficient and impressive assistance.”

THE FIRM This trade mark boutique attracts national and international clients and encompasses a patent office capable of handling disputes. Recent highlights include successfully representing an international pharmaceutical company in a trade mark dispute. Other long-standing clients include MTV Networks and EMI Group.Trade mark and competition specialist Valborg Kjartansdóttir receives praise from all corners. A client comments: “She is extremely dedicated and finds strategies that work.”Peers commend the trade mark expertise of Magnús Haukur Magnússon. He often represents clients before the district courts and Supreme Court.


This boutique is highly regarded for its strong trade mark practice. It has attracted an impressive clientele, including large international companies, and primarily deals with cross-border mandates. Its major clients include MTV Networks, EMI Group and United Biscuits. The compact team also regularly provides trade mark advice to Icelandic manufacturers exporting their products overseas. Interviewees describe Magnús Haukur Magnússon as “a leading practitioner in the field of trade marks.” He is frequently present acting on trade mark litigation cases. Valborg Kjartansdóttir has dedicated her practice to trade mark questions for over two decades. Sources enthusiastically recommend her work in this area, as well as in domain name issues.


This boutique (Sigurjónsson & Thor ehf.) is praised for its specialisation in trade mark registration both nationally and internationally. It also advises clients on patents, unfair competition and IP litigation. The firm benefits from the long experience of partner Magnús Haukur Magnússon.


This IP boutique has made a name for itself with a successful focus on trade mark and unfair competition matters. It frequently advices Icelandic patent and trade mark owners, and yet the majority of tis work involves assisting international companies with trade mark searches, the registration of trade marks and opposition against trade mark applications. Peers admire the group´s foreign clientele – one of the biggest and most diverse in Iceland – including global giants. The company has two renowned partners, who dedicate themselves entirely to IP matters.

Magnús Haukur Magnússon takes on considerable trade mark, copyright and patents work while Valborg Kjartansdóttir is the country´s only lawyer with over two decades of exclusive experience in trade mark work.


WTR 1000 – The World’s Leading Trademark professionals:


Gold-plated boutique Sigurjónsson & Thor has practised at the vanguard of the Nordic trademark scene for nearly 50 years. Its dedicated, service-minded and responsive professionals are polished courtroom performers and know what it takes to bring administrative disputes before the patent office to a successful close. On the non-contentious side, it can also field any questions relating to the protection of trademarks in Iceland and and executes flawlessly on both large-scale filing programmes and single-instance applications. Forming one of the most experienced IP pairings in the region are Valborg Kjartansdóttir and Magnus Magnússon. Kjartansdóttir has been a partner at the firm for well over two decades, and has also occupied many high-level positions in the Icelandic Bar Association and the Association of Icelandic Trademark and Patent Agents; she knows the local IP landscape inside out. So too does Magnússon, a Supreme Court attorney with a finely honed understanding of trademark and competition law.


Trademark and unfair competition law specialist Sigurjónsson & Thor breaks into the gold tier this year on the back of the results it has secured for some of the world’s most renowned brands. The firm hit the headlines when it represented Starbucks before the Icelandic Board of Appeal in a matter concerning the issuance of the CAFFE VERONA mark. Significant work for Japanese brand Uni-Charm was also widely reported in the press. Representing both of giants was the quick-witted Valborg Kjartansdóttir; the consummate professional deploys her longstanding experience to untangle knotty scenarios. Magnus Magnússon is a smooth operator before the Supreme Court; the decorated partner has a number of impressive victories to his name.


Practising exclusively in trademarks and unfair competition, the lawyers at this boutique live and breathe trademark law and procedure. An in-house database of all trademarks registered in Iceland is just one of the dedicated tools that set it apart from peers. It has a particular facility for oppositions and precedent-setting litigation; on behalf of a leading Icelandic jeweller, it secured a ruling from the district court that the transfer of a business includes all trademarks if there is no agreement to the contrary. It has also prevailed before the patent office for Elle magazine publishers and O2. Acclaimed duo Valborg Kjartansdottir and Magnus Magnússon enjoy prominent standing among peers for their active engagement in the legal community and expansive, up-to-date IP knowledge.


This stunning boutique has turned away from patent work to focus exclusively on trademark matters and can offer well-honed advice on the entire lifecycle of a mark. The majority of mandates come from overseas, with major players in the pharmaceutical sector a mainstay of its illustrious clientele. The firm is home to two of Iceland’s most venerated practitioners, Valborg Kjartansdottir and Magnus Magnússon, they “are both never short of excellent and share an outstanding command of the law”.


Cost effective, higly efficient and with an exclusive focus on trademark matters, Sigurjonsson & Thor is a dynamic presence on the market. In recent years the firm has secured an increased stake in the filing market, as clients – the majority of which are based overseas – recognise the quality of service on offer. Its sterling reputation is also acknowledged in the contentious sphere, where it expertly handles suits across a range of industries. “Highly accomplished and unreservedly recommended”  Magnus Magnusson has extensive experience both in private practise and as a Supreme Court attorney. Valborg Kjartansdóttir is a “main player in Iceland; she is an outstanding lawyer who devises brilliant strategies to achieve the best possible results”.