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Grosch, Dr. Marcus
Direct Tel: +49 (0) 89 20608 3001
Berlin
Tel: +49 30 300147000 Fax: +49 30 300147100
Mannheim
Tel: +49 621 43298 6000 Fax: +49 621 43298 6100
Munich
Tel: +49 89 20608 3000 Fax: +49 89 20608 3100

Dr. Marcus Grosch is a German qualified attorney (Rechtsanwalt) and Managing Partner of the German offices. Marcus is a litigator with 25 years of court room experience. He focuses on complex civil litigation, with an emphasis on patent and commercial litigation. Marcus regularly represents industry leading clients in all sectors including high-tech, automotive, life-science, chemical and finance. He has been lead counsel in numerous high-stakes cases and has outstanding experience in coordinating lawsuits in multiple jurisdictions. 

Marcus is one of the rare European “trial lawyers” (to use the American equivalent) who has led cases in all relevant German courts, the EPO (Opposition Divisions and Boards of Appeal), the German PTO and the UPC. Marcus has pleaded several hundred of significant cases before the German District and Appellate Courts, including the Federal Supreme Court in nullity appeals. He is intimately familiar with all aspects of procedural law and practice, including interim relief, rules of evidence as well as appeal and has in depth experience regarding all aspects of international procedure, including section 1782 USC motions (US federal discovery assisting foreign litigation). He has been successful in several legal milestone cases, including cases against the odds like the Federal Supreme Court’s widely cited leading precedent changing the law on the stay of injunctive relief which was based on one of the extremely rare motions for reconsideration (BGHZ 202, 288 – for Motorola/Google versus Microsoft).  

Beyond his court room practice, Marcus has significant experience in all fields of complex dispute resolution, including commercial litigation strategy, finance litigation and international arbitration. For years, he has been a lead strategy advisor to one of the biggest automotive OEMs in the Diesel emission litigation and regularly acts in complex arbitration matters in various fields, including construction and energy. Marcus has advised clients in corporate litigation matters, including cases for interim relief regarding voting rights and take-over scenarios as well as banks and funds in disputes over financial investments.  

For the last 20 years, Marcus has been regularly awarded top ratings in leading international and German ranking publications (see detailed list under “Awards”).

He won the “Practitioner of the Year” award for Germany (Patent: Law Firms) for Managing IP EMEA in 2024while the Managing IP’s rankings have named Marcus as a “Patent Star” since 2016.

In the 2025 rankings for Chambers Global, Marcus was once again ranked Band 1 for patent litigation in Germany, with sources saying, “Marcus Grosch is an excellent and creative oral advocate who shines when arguing in hearings. He quickly grasps difficult technical arguments and can pivot flawlessly in hearings when necessary.” and “Marcus Grosch is an amazing lawyer who is able to handle complex technical cases.” Chambers Germany 2025 also recommends him for patent litigation in Germany. He is also recognized by Chambers Global for his “Foreign Expertise in USA”.

In their 2025 rankings, Legal 500 Deutschland and Legal 500 EMEA have  placed Marcus again in their Hall of Fame for patent litigation in Germany, where sources commented that he is “available at any time with his comprehensive expert knowledge ‘on demand’”.

Marcus has been ranked by Leaders League as “Leading” for Patent Litigation in their 2024 and 2025 rankings. Leaders League have also ranked him for Commercial Litigation in 2025, and for International Arbitration in 2025.

JUVE once again named him a “Leading Individual” for patent litigation in their 2024/2025 rankings, with clients praising Marcus’ ability to “efficiently guides cases by hitting the nail on the head” and competitors calling him an “impressive litigator”. He has been ranked by JUVE for patent litigation since 2012. He has also been ranked by JUVE as a „Leading Individual“ for Dispute Resolution in Germany since 2021. Marcus was listed as a „Recommended Individual“ by JUVE Patent in their inaugural UPC Litigation 2025 rankings, with clients calling him a „top lawyer“ and with competitors praising him as an „excellent litigator with great experience in coordinating lawsuits in multiple jurisdictions.“

The 2025 rankings for  IAM Patent 1000 has once again ranked Marcus in their 'Gold' category for 'Recommended Individuals' for patent infringement cases in Germany. In 2024 Marcus was selected for the 2024 edition of the IAM Global Leaders Guide, which features the IP elite from across the IAM Patent 1000 rankings.

Lawdragon has recognized Marcus in their list of "500 Global Plaintiff Lawyers" for Complex & Patent Litigation in 2024 and 2025.

In their 2025 rankings, Lexology Index (formerly Who’s Who Legal) has again recognized Marcus as a “Thought Leader” in Germany for Intellectual Property.

Marcus was recognized as a “Litigation Star” by Benchmark Litigation in their 2024 rankings.

He was ranked #1 in the WirtschaftsWoche “Legal All Stars 2023” rankings for patent litigation in Germany and in 2025 was ranked as a “TOP Anwalt” for patent litigation in Germany for the eighth time in WirtschaftWoche’s “TOP Kanzlei Patentrecht & Urheberrecht 2025” ranking.

Marcus holds degrees from the University of Mannheim (JD equivalent and Ph.D., summa cum laude) and Yale University Law School (LL.M.). He was a member of the German National Academic Foundation (Studienstiftung des Deutschen Volkes), Germany’s elite scholarship foundation.

Marcus regularly publishes books, treatises and articles that have been cited by the German courts, including the Federal Supreme Court on several occasions. He also publishes in English like the key parts in the chapter on judicial patent proceedings and case management in Germany in the international WIPO guide on patent case management for judges (https://www.wipo.int/patent-judicial-guide/en/full-guide/germany/5.6) or his article on preliminary injunctive relief in the UPC in the first edition of the GRUR-Patent in 2023 (grur-patent-01-23-marcus-grosch-provisional-injunctions-in-the-upc.pdf (quinnemanuel.com).

  • BASF
  • BlackBerry
  • Mercedes-Benz
  • Dexcom
  • Google
  • Jennewein Biotechnologie
  • Mercedes-Benz
  • Netflix
  • Qualcomm
  • Tesla
  • Representing Google in its worldwide dispute against Sonos, securing the dismissal of a PI application against Google at the appellate level (Hamburg court). This has been one of the front runner cases regarding strategy in German patent litigation.
  • Successfully defending Netflix in a series of patent proceedings against Broadcom before the Mannheim court, the EPO and the Federal Patent Court.
  • Successfully defending Google against Philips in the Düsseldorf and the Mannheim infringement courts and at various appellate levels, including the Federal Supreme Court.
  • Securing a key injunction for Qualcomm against Apple pertaining to iPhones 8 in the Munich court.
  • Securing several injunctions for Blackberry against Facebook, WhatsApp et al. in significant proceedings relating to mobile phone patents in the Munich court.
  • Securing an important victory for BASF in a commercially significant dispute over soles for sports shoes in the Düsseldorf court.
  • Successfully defending Daimler AG in the dispute over connected cars patents and standard essential patents, one of the largest patent disputes of the past decade, in various courts, including Mannheim, Munich, Düsseldorf, EPO and Federal Patent Court.
  • Securing an injunction for a major global medical device manufacturer in the Mannheim court.
  • University of Mannheim
    (PhD, (Dr. iur.), summa cum laude, 2002)
  • Yale University Law School
    (LL.M., 2001)
  • Appellate Court of Zweibrücken
    (Second State Examination, 1999)
  • University of Mannheim
    (First State Examination, 1997)
  • Admitted to the German bar (Rechtsanwaltskammer Karlsruhe)
  • German
  • English
  • Allen & Overy:
    • Partner, 2007-2010
  • Schilling & Grosch:
    • Partner, 2002-2006
  • Schilling, Zutt & Anschütz, Frankfurt:
    • Associate, 1997-2000
  • Chambers Europe – Band 1 for Patent Litigation in Germany (2015-2025)
  • Chambers Germany – Band 1 for Intellectual Property: Patent Litigation (2025)
  • Chambers Global – Band 1 for Intellectual Property: Patent Litigation (Germany) (2016-2025)
  • IAM Patent 1000– Gold ranking for Patent Infringement in Germany (2016-2025)
  • IAM Global Leaders Guide – Selected (2023-2024)
  • JUVE – Leading individual for patent litigation in Germany (2012-2025); Leading individual for dispute resolution in Germany (2021-2025); Top 40 German lawyers under 40 years of age (2006, 2012)
  • JUVE Patent – Recommended Individual for UPC Litigation (2025)
  • Lawdragon – 500 Global Plaintiff Lawyers for Complex & Patent Litigation (2024-2025)
  • Leaders League – Leading for Patent Litigation (2022-2025); Highly Recommended for Commercial Litigation (2022-2025); Recommended for International Arbitration (2024-2025)
  • Legal 500 Deutschland and Legal 500 EMEA – Hall of Fame for Patent Litigation in Germany, Tier 1 (2015-2025)
  • Lexology Index (formerly Who's Who Legal) – Thought Leader in Germany for Intellectual Property (Patents) (2018-2025); Patent litigation (2024)
  • The Best Lawyers in Germany/Handelsblatt – Intellectual Property Law (2014-2026); Litigation (2021-2026); Appellate practice (2023-2026); Lawyer of the Year – Intellectual Property, Bavaria (2021, 2026)
  • WirtschaftsWoche – TOP Anwalt for Patent Litigation in Germany (2025 and seven additional years); #1 in Legal All Stars for Patent Litigation in Germany (2023); Legal All Star for Patent Law (2020)
  • Benchmark Litigation – Litigation Star (2024)
  • Managing IP – Practitioner of the Year for Germany (Patent: Law Firms) (2024); Patent Star for Germany (2016-2025)
  • Euromoney Expert Guides – Best of the Best for Patent Litigation in the USA and Germany (2022); Best of the Best for Patent Litigation in Germany (2020)
  • Mannheim University and Duden publishing house – First award for excellence in academic writing in the German language for dissertation thesis
  • ERP program – Scholarship (2000)
  • German National Academic Foundation – Scholarship (1992-1996)
  • Article: Beschränkte Geltendmachung des Klagepatents im EPG und im deutschen Recht, Festschrift für Thomas Kühnen, 1. Ed., (Heymanns, 2024)
  • Author of chapter 5.6 and 5.9 of Judicial patent proceedings and case management in Germany, in the International WIPO Guide on Patent Case Management for Judges (2023)
  • Article: Provisional injunctions in the UPC and the sufficient degree of certainty regarding validity in GRUR Patent 1/2023, p. 25 et seq.
  • Article: Nichtzulassungsbeschwerde nach teilweiser rechtskräftiger Beschränkung des Klagepatents, Festschrift für Peter Meier-Beck in GRUR 2/2021, p. 210 et seq.
  • Prozessrecht (Hauptsacheverfahren und Zwangsvollstreckung zum Unterlassungsanspruch) in UWG Großkommentar, Dritter Band, § 12 Abschnitt A, 3rd Ed. 2020
  • Review: Thomas Kühnen, Handbuch der Patentverletzung, 12th Ed. 2020, GRUR 2020 p. 594 et seq.
  • Handbook on Know-How Protection, editor and co-author with C. Ann, M. Loschelder (Heymanns, 2010)
  • Zum Streitgegenstand im Patentverletzungsprozess unter Berücksichtigung der Rechtsprechung zum Wettbewerbs- und Markenprozess, Festschrift for Tilman Schilling, pp. 207 – 236 (2007)
  • Gewerbliche Schutzrechte und ihre Durchsetzung, Festschrift for Tilman Schilling, co-author with Prof. Dr. Eike Ullmann (2007)
  • Review: Prof. Sack, Unbegründete Schutzrechtsverwarnungen, Mitteilungen der deutschen Patentanwälte, p. 93 (2007)
  • Schadensersatzfeststellung und Rechnungslegung für die Zeit nach Schluss der mündlichen Verhandlung? Festschrift for Günther Eisenführ, co-author Tilman Schilling, p. 131 (2003)
  • Rechtswandel und Rechtskraft bei Unterlassungsurteilen (Heidelberg, 2002)
  • Mitteilungen der deutschen Patentanwälte 2002, p. 485 (comment on a decision of the German Patent Court)
  • Freiburg University:
    • Lecturer in Patent Law, since 2007
  • Member, GRUR
  • Member, AIPPI
  • Member, German Bar Association (Deutscher Anwaltsverein)