Dr. Tobias J. Hessel


Tobias J. Hessel has worked as an attorney since 2009 and advises and represents clients in national as well as multi-jurisdictional litigation cases. He mainly represents clients in patent and utility model infringement cases and in parallel opposition and nullity proceedings at the European Patent Office and the German Federal Patent Court. He also represents clients in damages proceedings. Tobias’ clients are predominantly in the fields of information technology, medical devices, telecommunications, and semiconductors.

Tobias studied law at the University of Osnabrück with a strong focus on intellectual property law and U.S. law. Tobias is a visiting lecturer in patent law at the law faculty of the Johann Wolfgang Goethe University, Frankfurt am Main, and visiting lecturer at the law faculty of the University of Osnabrück for Patent Law.

    • Representing a market leader in the field of optics providing extensive patent portfolio analysis and advice (2013 – present)
    • Representing a market leader in mobile telecommunications in numerous multi-jurisdiction patent litigation cases, particularly in relation to antitrust and FRAND issues (2012 – present)
    • Representing a major global chip manufacturer in numerous patent litigation cases and in relation to employee invention matters (2012 – present)
    • Representing a leading global medical technology leader in 3D trademark proceedings at a national and OHIM level including infringement proceedings (2011- 2013)
    • Representing a global medical technology leader in extensive patent litigation against a major competitor in the field of structural heart disease right up to the Federal Court of Justice (2009 – present)
    • Representing a market leader in global mobile telecommunications in numerous cross-border patent litigation cases against various competitors, involving a large number of standard-essential and implementation patents as well as significant antitrust and FRAND issues (2009 – present)
    • American Intellectual Property Law Association (AIPLA)
    • German Association for the Protection of Intellectual Property (GRUR)
    • Intellectual Property Owners Association (IPO)
    • Association of Intellectual Property Experts (VPP)
    • Hessel/Schellhorn, Die Rückabwicklung des vorläufig vollstreckten Unterlassungstitels im Patentrecht, GRUR 2017, 672
    • Hessel, Ein Vergleich der Eingriffsschwellen im deutschen und US-amerikanischen Recht unter besonderer Berücksichtigung der Rechtsprechung des Supreme Court bei Eingriffen in die Privatsphäre, Duncker & Humblot 2010
    • Lunze/Hessel, Overview of the most important amendments resulting from the Act for the Simplification and Modernization of Patent Law, Mitt. 2009, 433
    • Hessel in: Schreibauer, Marcus/ Hessel, Tobias J. : The 41. Amendment of the German Criminal Code regarding cyber criminality, Kommunikation & Recht 2007, p. 616 – 619
    • Visiting lecturer for patent law, Johann Wolfgang Goethe University, Frankfurt am Main
    • Visiting lecturer at the faculty of law of the University of Osnabrück for Patent Law
    • “Tobias Hessel is easy to deal with, approachable, has respect for his clients and is very knowledgeable.’” – Legal 500 EMEA, Germany, 2022
    • “IP Star” (Patent, Germany), Managing Intellectual Property IP Stars 2021
    • Tobias J Hessel is intimately familiar with US patent law and “provides clear guidance, is willing to take educated risks and puts the interests of clients first, second and third”. iam Patent 1000, 2021
    • “The keys to his success are his analytical skills and ability to think outside the box and adopt new perspectives, which result in compelling arguments and winning strategies. He also knows the legal playgrounds – both national and international – and, equally important, the needs of an international business. In combination with his attention to detail and business-mindedness, this makes him an outstanding attorney that any client can confide in.” iam Patent 1000, 2020
    • Managing Intellectual Property – IP Star (Patent, Germany), 2020/21
    • Valued for ‘his prudent and inclusive advice and quick and binding response.’ Legal 500 Germany, 2018
    • “…notable patent litigator”, MIP IP Stars 2018

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