This book explores the key substantive, methodological, and institutional issues raised by the proposed EU unitary patent system contained in EU Regulations 1257/2012 and 1260/2012, and the Unified Patent Court Agreement 2013. The originality of this work lies in its uniquely broad approach, taking seven different perspectives - historical, constitutional, international, competition, economic, institutional, and forward-looking - on the proposed EU patent system. It offers an appraisal of the proposed unitary system, from experts in patent law, EU constitutional law, private international law, competition law, and economics, as well as leading figures from the worlds of legal practice, the bench, and the European Patent Office. The unitary patent system raises issues of foundational importance in the fields of patent and intellectual property law, EU law, and legal harmonization. The book will be of wide and enduring interest to academics, policy makers, decision makers, and practitioners.