Fabian Leimgruber

Senior Partner at ThomannFischer

Fabian Leimgruber is a senior partner in ThomannFischer’s IP prosecution and litigation team. He is a registered European and Swiss patent attorney and an admitted lawyer for the Swiss Federal Patent Court. For more than 20 years he has worked with leading international companies to build up their IP portfolios and resolve their IP and technology-focused disputes, including before trial and appellate courts, domestic and international arbitration tribunals and the EPO.

Dr Leimgruber has a double degree in physics (Dr/PhD) and law (Dr/JD) and an LLM. One of his specific areas of expertise is implementing and leading international and national patent infringement litigation and nullity actions. He handles complex patent cases in all Swiss and German courts and before the EPO. In recent years, he and his team have run several large patent cases involving patents and standards. As such, he has a substantial track record in EPO opposition and appeal actions, as well as in national nullity and infringement proceedings.

Besides his procedural work, Dr Leimgruber maintains a large patent prosecution portfolio for clients. He has many years’ experience in various patent and trademark law firms in Bern and Basel, with a focus on electronics, mobile communication technology, information technology, nanotechnology, business methods and software patenting, particularly in the emerging field of insurance and financial technology patenting.

Dr Leimgruber provides strategic advice and expertise and represents clients in European and Swiss (Swiss Arbitration Association) arbitration and Asia-Pacific (Singapore Institute of Arbitrators) cases. He has an established relationship with Asia and a good sense of the particularities associated with the various Asian legal systems through his long-term experience in Singapore and Shanghai.

As an author and speaker, Dr Leimgruber has recently addressed topics such as reverse payment agreements, worldwide developments in software and business model patenting (Europe, the United States and Asia-Pacific) and the upcoming UPC.

Professional associations

  • ASA
  • epi

Firm details

Elisabethenstrasse 30
Basel 4010

Contact details

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