Jean-Guy de Ruffray Image

Jean-Guy de Ruffray



Jean-Guy de Ruffray, Partner at Advant Altana and member of the Paris bar, focuses his activities on IT law and intellectual property law, both as an advisor and a litigator.

He notably accompanies his clients in patent, trademark, and copyright law, as well as in data protection law, digital law, and all contracts related to digital transformation (websites, mobile apps, IoT, SaaS agreements, database licensing, etc.) and e-commerce, all with a strong international dimension, and with a particular focus on innovation. He works for clients in various sectors of activities, and notably in the real estate/construction, digital, entertainment, and insurance sectors.

Jean-Guy de Ruffray has taught within the certificate of specialization in intellectual property and new technologies and lectured on the themes “international aspects of intellectual property”, “arbitration and intellectual property” and “cybersecurity” with the Development Institute International and the DJCE (at Paris University, see

He joined Altana at its creation in 2009 and began his career at Freshfields Bruckhaus Deringer LLP. He is a member of INTA (International Trademark Association) and of the APRAM (Association des praticiens en droit des marques et des modèles).

Recent Articles by Jean-Guy de Ruffray

#IPconsiderations for Protecting Hashtags as Trademarks

With its widespread use on social networks, mainly on Twitter, the hashtag has become a real communication tool. As a result, there have been a number of trademark registrations with the “#” symbol in the last few years. The question remains, however, as to whether using a third-party trademark with the “#” sign can be considered trademark use and is therefore likely to be infringing the trademark owner’s rights. The Oxford dictionary defines the hashtag as “a word or phrase with the symbol ‘#’ in front of it, used on social media websites and apps so that you can search for all messages with the same subject”.