Thommessen maintains its position in top tier for both patent and trade mark/copyright litigation. The firm's trump cards are its market-leading copyright and media expertise and, in the patent field, partner Arne Ringnes, one of the biggest names in IP. Competitors note that the firm is especially strong in electrical and mechanical expertise. "I was very happy with the quality – we switched to Thommessen on IP issues because of Ringnes's skills within the IP field and in particular related to litigation", says a client. Ringnes has "great knowledge of the law and how to conduct litigation in addition to his understanding of the commercial aspects relevant for our business (oil & gas)," says another client, adding: "He is a very polite, friendly and respectful person, which in my personal opinion is of some importance when it comes to public relations for a large, state-owned company in Norway".
In 2010, Eirik Raanes, Lars Christiansen, Kristine Schei and Sigrid Toft Fløystad advised Intervet International (Schering-Plough) in a case against Pharmaq. Ringnes and Harald Irgens-Jensen advised Mundipharma in a patent validity and infringement case relating to the drug oxycodone, while Jan Morten Evertsen advised Rubicon TV on agreements regarding television formats, game show productions and other forms of entertainment.