David Leffler

Contact Details

+46 761 761 908

Professional Experience

  • Lawyer, Synch, 2014 –
  • Legal Advisor, European Union Intellectual Property Office (Seconded National Expert), 2010-2014
  • Legal Advisor/Legal Officer, Swedish Patent and Registrations Office, 2007 – 2014


  • CEDR Accredited Mediator, 2013
  • Master of Laws (LL.M.), University of Lund, 2007
  • Legal studies, Dalhousie University Canada, 2005-2006

Legal/Business Competence areas

  • Intellectual Property
  • Dispute Resolution
  • Commercial Agreements


  • Swedish, English and Spanish


  • Secretary and Member of the Board of AIPPI Sweden 2017 –
  • Swedish Bar Association, 2017
  • INTA (International Trademark Association)
  • ICC Sweden (International Chamber of Commerce) – Member of the Intellectual Property Committee
  • Swedish Association for the Protection of Industrial Property (SFIR)
  • Swedish Anti-Counterfeiting Group (SACG)


David Leffler stands out for his work in this sector. A former legal adviser to the Swedish Patent and Registrations Office, he is currently secretary of the Swedish chapter of the International Association for the Protection of Intellectual Property and has contributed his expertise in cross-border IP work to the International Comparative Legal Guide to Patents 2017. IAM 1000 Patents

Ranked as a Rising Star by Managing IP

David Leffler is described by one client as a “highly skilled lawyer with a vast amount of technical knowledge within intellectual property.” This source goes on to praise his “effective, service-minded and business-oriented” approach. He has a strong track record in contentious IP matters, representing clients in national and cross-border trade mark disputes. Chambers & Partners Europe (2018)