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 Picture of Jose Luis Arnaud
Managing Partner

Lawyer

José Luís Arnaut

Managing Partner

Languages
  • Portuguese
  • English
  • French
  • Spanish
Social media

José Luís Arnaut is the Managing Partner at CMS Portugal and heads the TMC – Technology, Media and Communications, Intellectual Property as well as Life Sciences and Healthcare teams.  

He has extensive experience providing strategic advice to public and private companies and is a highly regarded intellectual property lawyer, with a special focus on patents, trademarks, domain names, and new technologies.

He is a European Patent Attorney at the European Patent Office (EPO); a European Trademark Attorney at the European Union Intellectual Property Office (EUIPO), as well as an Industrial Property Official Agent at the National Institute of Industrial Property (INPI).

José Luís is acknowledged as Eminent Practitioner for Intellectual Property, by Chambers Europe and has been ranked for the past 18 years. He is also acknowledged as a Leading Individual in the Hall of Fame for Intellectual Property and he is recommended for TMT, and for Data Privacy and Data Protection, by Legal 500, 2025. Moreover, he was awarded the Best Practice - Outstanding Achievement Award, by Iberian Lawyer, in 2021 and Trade Mark and Transactions Star in 2024, by IP Stars. He has also been awarded Gold Individual – WTR1000 for the past years. He is also ranked for IP - Trademarks, by WWL, and he has been recognised for Intellectual Property, by Best Lawyers since 2010. In addition, he is ranked Excellent for IP Litigation and Data Privacy & Data Protection & Data Privacy, as well as Highly Recommended for Technology and Trademark Prosecution by Leaders League, 2024.

José Luís Arnaut is a member of the board of directors of several national and international entities.

Founding partner of CMS Portugal.

Awards & Recognitions
01
  • Award
    Great competence and agility in approaching and handling processes. Enormous ability to clearly identify customer needs and propose strategies for them.
    Legal 500 (2025)
  • Quote
    Their professional team is very large and their business fields are diversified. They can provide us with one-stop convenient services. Efficient and timely feedback.
    Legal 500 (2024)
  • Quote
    The law firm's team is very solid and knowledgeable in the field. Its responses are always quick and positive.
    Chambers Europe (2024)
  • Quote
    Miguel Quintans and José Luís Arnaut are recommended for their speed and knowledge.
    Legal 500 (2023)
  • Quote
    The general level of service is excellent as they have a team that shows: good in-depth knowledge and understanding of the legal framework; high technical competence; professionalism.
    Legal 500 (2022)
  • Quote
    José Luis Arnaut is well known in the market and offers expertise in trade mark issues, including portfolio management, anti-counterfeiting and brand protection matters. One commentator describes him as being "a statesman when it comes to intellectual property, delivering unparalleled levels of advice, which add incommensurable value to the work being carried out.“
    Chambers Europe (2022)
  • Quote
    Leading Individual and Hall of Fame for Intellectual Property
    Legal 500 (2021)
  • Quote
    Recognised Lawyer for Data Privacy and Data Protection and TMC
    Legal 500 (2021)
  • Quote
    Eminent Practicioner for Intellectual Property
    Chambers and Partners (2021)
  • Quote
    Best Practice, Outstanding Achievement Award
    Iberian Lawyer (2021)
  • Quote
    Recognised Lawyer for Intellectual Property
    Best Lawyers
  • Quote
    Trade mark star 2021 and Transactions star 2021
    IP Stars
  • Quote
    We have been working mainly with Miguel Quintans and José Luis Arnaut. All of them are experts in their practice, with deep knowledge of the general legal framework, thus ensuring that all issues are dealt with professionally and efficiently.
    Legal 500 (2021)
  • Quote
    José Luis Arnaut is well known in the market and offers expertise in trade mark issues with ancillary knowledge of data protection matters.
    Chambers and Partners (2021)

Relevant experience

  • Since 1992 he has been European Patent Attorney at the European Patent Office (Munich).
  • Since 1996 he has been European Trademark Attorney at the European Union Office for Harmonization in the Internal
  • Market (Alicante) and Official Industrial Property Agent at the I.N.P.I. - National Institute of Industrial Property
  • In 1996 he was a member of the Monitoring and Revision Commission of the Industrial Property Code and between 1998 and 1999 he was a Member of the Revision Commission of the Industrial Property Code
  • He was a Member of Parliament for 12 years
  • He was Minister of State to the Prime Minister José Manuel Durão Barroso (2002 - 2004) and Minister of Cities, Local Administration, Housing and Regional Development (2004 - 2005). He was President of the Foreign Affairs Committee

Publications

  • ARNAUT, José Luís- “Data protection and cybersecurity in Portugal: challenges ahead through 2023”, (co-authored with João Leitão Figueiredo), in Legal500, 2023
  • ARNAUT, José Luís; MIOLUDO, João Paulo; GUIA, Diogo – “Marcas & Patentes Legislação”, Lisboa, Texto Editora, 2009
    Independent European Sport Review de 2006
  • ARNAUT, José Luís, - “Livro Verde sobre a Patente Comunitária e o Sistema de Patentes na Europa”, in Seminário do INPI, Lisboa, 1998
  • ARNAUT, José Luís, - “A Marca Comunitária na União Europeia” – in XVI Seminário Nacional de Propriedade Intelectual da ABPI, São Paulo, Brasil, 1996
  • ARNAUT, José Luís, - “Recursos Judiciais das Decisões do INPI”, in Seminário da Propriedade Industrial, INPI, 1995
  • ARNAUT, José Luís (co-authored) “Portugal” chapter, published in International Protection of Intellectual Property Rights, of Center for International Legal Studies de Viena, 1995
  • ARNAUT, José Luís, - “License and Distribution Agreements in Portugal”, in Gazette Law Society House, London, 1993
  • ARNAUT, José Luís, - “La Marque Tridimensionelle en Droit  Portugais”, Université Robert Schuman, Strasbourg, 1990

Memberships & Roles

  • Member of the Portuguese Bar Association since 1991
  • Member of the American Bar Association (ABA) from 1996 to 2019
  • Member of several international associations related to Intellectual Property, in which he has already held leading roles:  International Trademark Association (INTA), Association for the Protection of Intellectual Property (AIPPI)

Education

  • Law degree, Faculdade de Direito, Universidade Lusíada
  • Diplôme d’Études Supérieures Spécialisées en “Accords et Propriété Industrielle”, CEIPI – Centre d’Études Internationales de la Propriété Industrielle, Université Robert Schuman em Strasbourg
  • Professional Representative before the European Union Intellectual Property Office (EUIPO)