This book is the seventh volume in the book collection propriété intellectuelle – intellectual property (www.pi-ip.ch) which is edited at the Law School of the University of Geneva (by Prof. Jacques de Werra). It collects the papers (listed below) which have been written for the intellectual property law conference (« Journée de Droit de la Propriété Intellectuelle », www.jdpi.ch) which was organized on February 14, 2014 at the University of Geneva on the topic « Défis du droit de la concurrence déloyale / Challenges of Unfair Competition Law ».