Ida Gjessing


Ida Gjessing is a litigator with a focus on patent and trademark cases. On the non-contentious side she provides advice on all aspects of IP law, including designs and copyrights, research ethics and marketing law. She chairs the Council dealing with Unfair Marketing Practices (NKU).


Rankings and recognitions

  • Leading individual in IP – the Legal500 2018
  • Top ranked in IP – Chambers Global and Chambers Europe 2019
  • IP Stars:  Patent Star 2018
  • IP Stars: Trademark Star 2018
  • IP Stars: Top 250 Women in IP 2018
  • Ranked IAM Patents 1000 2019
  • Who’s Who Legal Life Sciences: Patent Litigation 2019
  • Who’s Who Legal Patents: Lawyers 2019


Litigating patents and SPCs (pharmaceutical, biosimilars and veterinary patents, oil and gas services industry), trademarks (all sectors). Advising clients on the aforesaid matters, and on contractual and regulatory matters, across all sectors.


Partner, GjessingReimers2019-
Partner, Grette2007-2019
Attorney, Advokatfirmaet Wiersholm
Attorney, Nycomed Amersham1997-1999
Deputy Judge, Jæren District Court1996-1997
Trainee at the Court of Justice of the European Communities
Associate, the Office of the City Advocate in Oslo


Lawyers' practising certificate
Master of Laws, University of Oslo1993
Studies in legal philosophy, EU law and German business law at Christian Albrects Universität zu Kiel1991-1992


Member of the Norwegian Bar Association's committee on intellectual property law2012-2015
Chair of the Norwegian Industry's Committee on Competition2012 -
Member of the Norwegian Bar Association's Committee on Ethics2016 -
Government Grants for Artists, deputy member of the Committee2018 -


  • “International Licensing and Technology Transfer:  Practice and the Law” Klüwer Law International, co-author
  • “International Design Protection, A Global Handbook”, Globe Law and Business, co-author
  • “International Advertising Law, A Global Handbook”, Globe Law and Business, co-author
  • Tidsskriftet NIR Nordiskt Immateriellt Rättsskydd, former editor for Norwegian contributions


The Norwegian Bar Association

The Norwegian Association for the Protection of Industrial Property

Association Internationale pour la Protection de la Propriètè Intellectuelle – AIPPI

European Patent Lawyers Association (EPLAW)


The Scandinavian languages, English.