top of page

Our Team

Photo Mars biais_edited_edited.jpg

Marie-Avril Roux-Steinkühler LL.M
Lawyer - Member of the Paris and the Berlin Bars
Specialist in intellectual property law & digital and communications law

  • LinkedIn

Marie-Avril Roux is a seasoned IP lawyer with more than 20 years of experience in business and intellectual property, with focus on copyright, entertainment, media, new technologies and trademarks. After 15 years practice in Paris, she is now based in Berlin and further advises or litigate for her clients in France and Germany.

Her particularity: a specialized bi- and international IP practice in three languages, French, English and German.

Marie-Avril has been practicing in all areas of copyright and entertainment Law: publishing, music, cinema, television, radio, live performance, advertising, art, counterfeiting, plagiarism, sponsorship, patronage, privacy, image, advising producers, publishers, authors, artists and celebrities. She litigates in France and also in Germany. Her practice also includes the representation of creators and artists and the management of their rights.

The other focus of her practice is trademark protection. She advises international companies on their brands and new technologies. She manages and develops trademark portfolios in more than 70 countries, in addition to designs and domain names. She advises, drafts and negotiates license agreements, coexistence etc., provides representation before the French trademark office INPI, the German trademark office DPMA, the EUIPO, and the Court of Justice of the European Union. She practices also in Data privacy Law.

Her clients are mainly involved in publishing, production, fashion, food industry, finance mainly, and she counsels several NGOs.

She was also appointed Conseiller du Commerce extérieur de la France ( and co-chair of French Tech Berlin (, which helps and supports the development of French start-ups in Germany.
She is also president and co-founder of APPEAL-E (Association pour la Promotion de l'Exercice des Avocats Français à l'Etranger
She also acts as legal advisor to IRAFPA in Geneva (the Institute for Research and Action on Academic Fraud and Plagiarism
She is a member of APRAM (Association des Praticiens du Droit des Marques et des Modèles, GRUR (Deutsche Vereinigung für gewerblichen Rechtsschutz und Urheberrecht, AGEM (Arbeitsgemeinschaft der Rechtsanwältinnen und Rechtsanwälte der Fachbereiche Urheber- und Medienrecht und Gewerblicher Rechtsschutz, and DFJ (Deutsch- Französische Juristenvereinigung

She likes to support her clients in their projects and develop these projects with them, being flexible and inventive. Her first training at Sciences Po in commerce and finance, and then her experiences in mergers and acquisitions, gave her an operational approach and allowed her to support the establishment of French companies' activities in Germany.

Photo JK 2023_edited.jpg

Johanna Kühne LL.M. & Maître en droit
Lawyer - Member of the Berlin Bar

  • LinkedIn

Johanna Kühne is a multilingual lawyer at the Berlin Bar and a committed European. She completed her university education at the University of Potsdam and the Université Paris Nanterre La Défense, where she obtained a dual Franco-German Master 2/ LL.M. degree in law, economics and management.

She then completed her legal internship at the Kammergericht in Berlin. Her civil clerkship was at the Berlin District Court - Civil Chamber 15 - which is responsible for the special areas of unfair competition law, trademark law, copyright and publishing law, design law, claims arising from these legal areas under general personality law, decisions under the Injunctions Act and cartel cases. She has already acquired solid and varied legal knowledge in the fields of media law, copyright and industrial property protection. She is currently broadening and deepening this knowledge by attending specialist lawyer courses.

As a member of the German Association for the Protection of Industrial Property and Copyright (GRUR), she is also involved in ongoing scientific training in German, European and international law, as well as in professional exchanges on current issues of industrial property protection and copyright.


Rémi Fouque, Docteur en droit
Doctor in law

  • LinkedIn

After obtaining a Bachelor's degree in Law and a Master's degree in Chinese Business Law from the Faculty of Law and Political Science at Aix-Marseille University, as well as an internship at Shimin Law Office in Shanghai, Rémi Fouque enrolled in a doctoral programme with Professor Banggui Jin in 2017. In 2022, he received his doctorate in law after defending his thesis on "Customs action against counterfeiting - a comparative study between China and France".

He is currently a student lawyer at the Ecole des Avocats du Sud-Est in Marseille, and is doing his "Individual Pedagogical Project" (PPI) internship at Mars-IP for a period of six months, before taking the Certificat d'Aptitude à la Profession d'Avocat (CAPA) in autumn 2024.

Rémi has always been interested in learning foreign languages, which has led him to learn and acquire English, German, Mandarin Chinese and, to a lesser extent, Spanish, and to optimise them from a legal point of view.
As well as preparing his thesis, Rémi was a lecturer at the Faculty of Law in Aix-en-Provence, specialising in the law of persons and family law.

Rémi is particularly interested in intellectual property law, private international law, comparative law, European Union law and inheritance law.
In the future, he hopes to add an international dimension to his career as a lawyer, particularly in Germany and the People's Republic of China.

A keen singer, pianist and theatre-goer, he hopes to put the experience he has gained in these disciplines to good use in his future career as a lawyer.

Susanne Klingenberg.jpg

Susanne Klingenberg
Office Manager, traductrice

  • LinkedIn

After her international management studies including stays in France, the USA and Dubai and a thesis about Brand and Trademark Law in China, Susanne started her career in Sales in Dubai before returning to Berlin in 1999 and taking over the showroom of a fashion label with responsibility for the East German market.

Her interests shifting towards Controlling and Finance, she stepped in as Business Unit Operations Manager for a British project management company in Berlin in 2002, followed by a further reporting interface position in a project development company in 2007.

Susanne has been self-employed since 2009 in the field of company set-ups, process optimizations, administration and bookkeeping, contract management and translations. She joined MARS IP in 2016 with the responsibility of invoicing, bookkeeping preparations and general administration.

bottom of page