Admitted to the Paris Bar in 2005 and Gide partner since 2017, Jean-Hyacinthe de Mitry specialises in French and EU industrial property law. His expertise includes both contentious and non-contentious matters primarily in all areas of industrial property (patents, trademarks, designs) and protection of know-how and trade secrets, and also in unfair competition matters and copyright,s notably relating to architectural works.

In contentious matters, he regularly advises and represents French and international clients, mainly in infringement disputes and in disputes relating to agreements having a strong IP and/or technology content. He has wide experience in national and multijurisdictional patent disputes, notably in the life sciences and telecom sectors. In trademark matters, he speaks before all French and EU courts. He can advocate equally in French and English.

In non-contentious matters, he regularly advises French and non-French clients in drafting and negotiating IP-related or technology transfer agreements (licenses, assignments, R&D agreements, etc.), whether as standalone agreements or as part of high-stake corporate deals or projects (IPOs, joint ventures, acquisitions, infrastructure projects, etc.).

Jean-Hyacinthe holds a postgraduate degree (DEA) in Intellectual Property (2003) and a Master's degree in business law from the University of Paris II, and graduated from SciencesPo Paris in 2001.

« Jean-Hyacinthe de Mitry demonstrates skill acting on both contentious and non-contentious patent mandates, including trade secrets and licensing agreements. He is sought out by clients acting in the  pharmaceutical, construction and fashion sectors.»
Chambers Europe & Global 2024 - Intellectual Property: Patents, France

« The team is led by Raphaëlle Dequiré-Portier, known for her experience handling patent litigation for the life sciences sector, alongside Emmanuel Larere and Jean-Hyacinthe de Mitry, who handle contentious and transactional matters. »
Legal 500 EMEA 2023 - Intellectual Property : Patents

« Jean-Hyacinthe de Mitry demonstrates skill acting on both contentious and non-contentious patent mandates, including trade secrets and licensing agreements. He is sought out by clients acting in the medtech, food and manufacturing sectors. Strengths: "As a client, it was very comfortable working with him and he was always available and up to date with the facts. He is a brilliant lawyer." »
Chambers Europe & Global 2023 - Intellectual Property: Patents

« One of the best in the market. »
Recommended Individual - JUVE Patent 2023

« As a client, it was very comfortable working with him and he was always available and up to date with the facts. He is a brilliant lawyer. »
Chambers Global 2023

« Le cabinet excelle dans la gestion du contentieux, comme en témoigne le large volant d’affaires traité par les cinq associés responsables de la pratique : Jean-Hyacinthe de Mitry, Arnaud Michel, Emmanuel Larere et Raphaëlle Dequiré-Portier – qui tous [...] interviennent aussi de manière significative en conseil. »
Legal 500 Paris 2022 - Propriété intellectuelle : Brevets

« Jean-Hyacinthe de Mitry enters the rankings this year thanks to a growing practice in the patents field. He routinely advises on infringement actions for international clients. »
Chambers Europe & Global 2022 - Intellectual Property: Patents, France

« Jean-Hyacinthe de Mitry is a gifted legal advisor. »
Legal 500 EMEA 2020 (Recommended for copyrights, trademarks & designs and patents - Next Generation Partner for patents)

« Able to work as a team on important cases and to combine the skills of each member of the practice. Very great professionalism. An international influence which facilitates the management of files. Jean-Hyacinthe de Mitry is a remarkable lawyer in the field of intellectual property. »
Legal 500 EMEA 2020

« very good lawyer with excellent strategic skills. »
JUVE Patent - Rankings France 2020