Photograph of Jan-Diederik Lindemans

Jan-Diederik Lindemans


Ranked as one of Belgium's top patent litigators by Intellectual Asset Management (IAM) 1000 - The World's Leading Patent Practitioners guide.

Jan-Diederik Lindemans is a partner in Crowell & Moring's Brussels office in the Litigation and Intellectual Property groups. His practice focuses on litigation for clients that are mostly active in sectors driven by technology, innovation and creativity.

Jan-Diederik is first and foremost a litigator and has over 15 years’ experience defending his clients’ interests in ex parte, preliminary and permanent injunction proceedings, and in accelerated and standard proceedings on the merits. Issues dealt with relate to intellectual property, trade secrets, unfair competition and other contentious matters. Jan-Diederik is also often consulted by clients in pre-trial matters such as pre-trial discovery (saisie contrefaçon), trade secrets compliance and anti-counterfeiting strategy. He further advises in non-contentious matters relating to licensing or transfer of intellectual property, (re)structuring IP portfolios, joint ventures and other types of creative/technological collaboration.

Jan-Diederik represents a wide range of clients, most of whom are active in the chemical, pharmaceutical, and biotechnological sectors, or the advertising, media, entertainment, and fashion industries. His focus is on legal advice that has an immediate impact on his clients’ business (e.g., product recall avoidance or opposition proceedings in relation to access to confidential information).

For his clients in the chemical, life sciences and biotechnology sectors, Jan-Diederik has, e.g., filed protective letters and represented clients in complex patent validity proceedings (often involving cross-border issues). His clients involved in entertainment and the media call on him to advise in negotiations as well as relying on him to defend their various IP rights (relating to e.g., on and off-screen talent, content production and licensing, and collecting societies). For clients in the fashion industry, Jan-Diederik has assisted with their IP portfolios and has represented them in commercial disputes, distribution, counterfeiting matters, search and seizure, and EU-wide or national border measures.

Representative Matters

  • Defended leading pharmaceutical companies in preliminary injunction proceedings regarding generic versions of blockbuster medicinal products.
  • Defended a multinational active in the sweetener industry in ‘bet the company’ all-or-nothing third party opposition proceedings against a direct competitor involving six appearances before the Belgian Supreme Court.
  • Executed the largest counterfeit seizure within the Benelux area on behalf of a producer of animal feed additives and upheld the client’s patent and trade secret rights in proceedings on the merits.
  • Initiated cease and desist proceedings against a multinational electronics manufacturer for breach of the terms of use of advertising material produced by the client.
  • Brought proceedings against the tabloid press on behalf of a well-known performer and his family in connection with the unauthorized use of images.
  • Defended shoe manufacturers against copyright and trademark claims by competitors relating to both orthopaedic and high-end luxury shoes.

Legal Rankings

Jan-Diederik has consistently been recommended in respected legal journals such as Legal 500 EMEA, IAM Patent 1000 and the World Trademark Review 1000.

  • Personally ranked in Chambers Europe for Intellectual Property.
    • “handles a range of intellectual property disputes, advising on patent, trade mark and copyright infringement” (2020)
    • “valued by clients for his ability to ‘anticipate every trap and step along the way,’” “is very good in court and able to think quickly on his feet.” (2019)
    • “ is well recognised in the market for his experience in patent infringement matters ” (2018)
  • Recommended in Legal 500 EMEA for Intellectual Property, Industry Focus: Media and Entertainment and Dispute Resolution.
    • “‘outstanding’ IP expert” “is knowledgeable and very hands on” “is fully dedicated to his clients and the matters entrusted to him” (2020)
    • “full of energy and enthusiasm, he is exactly the kind of lawyer that you want working on your case” (2020)
    • “highly regarded” “is singled out for his ‘abundant experience and deep analyses’” “sharp lawyer and good litigator” “has 'a proactive approach’” (2019)
    • “‘great professionals’ Kristof Roox and Jan-Diederik Lindemans ‘form a phenomenal duo’” (2018)
    • “‘hardworking’, ‘intelligent and likeable’” (2014)
  • Personally ranked in IAM Patent 1000.
    • “authoritative and clear litigator” (2019)
    • “quick-witted and astute” “an excellent attorney” (2018)
    • “intellectually sharp, he is clear in his arguments and excellent at pleading” (2017)
  • Personally ranked in World Trademark Review 1000.
    • “has a knack for turning around impossible cases” (2021)
    • “always sharp, very knowledgeable with a keen eye on the commercial interests of his clients” “really good at pleadings and has a persuasive manner of convincing the court” (2020)
    • “an ace on pre-trial discovery and injunctive proceedings with a reputation for excellence in both patents and trademarks” (2019)
    • “media, entertainment, food and fashion sage” “a flair for injunctive relief proceedings and pre-trial discovery” “peers praise him as a ‘great litigator’ with the proven ability to handle complex trademark cases ” (2018)
    • “enviable expertise” “great litigator with the proven ability to handle complex trademark cases” (2017)
  • Recognized by Who’s Who Legal for patents and life sciences.
  • The only Belgian patent litigator to be ranked by his senior peers in Legal Media Group’s Rising Stars 2015.

Jan-Diederik joined Crowell & Moring’s Brussels office in 2004 after working for a Brussels-based IP boutique law firm for several years. He is a frequent public speaker and the author of various publications on IP and judicial law. He was actively involved in the debate concerning the revision of the EU directive for trade secrets, and has closely monitored the developments concerning the Unified Patent Court.


  • Catholic University of Leuven (2001)
  • Ghent University, post academic course in biotechnology (2013)


Admitted to practice: in Belgium and before the European Court


  • The International Association for the Protection of Intellectual Property (AIPPI)
  • Brussels Bar Association
  • Belgian Association for Copyright
  • International Association of Entertainment Lawyers (IAEL)
  • ICC Commission on Intellectual Property
  • ICC Task Force on Trade Secrets
  • Amcham EU Intellectual Property Committee

View More

IAM Ranks Crowell & Moring in Patent 1000 2022 (June 30, 2022)
Firm News / Announcement
Working with freelancers, to work or not to work with a written agreement? (June 10, 2022).
"Towards Easier Access to Preliminary Injunctions for Patent Holders in the EU," Intellectual Property Bullet Analyses (May 4, 2022). Contacts: Jan-Diederik Lindemans, Matteo Mariano
Client Alert / Newsletter
Legal 500 EMEA Ranks Crowell & Moring in 11 Practice Areas and Recognizes Seven Lawyers (April 13, 2022)
Firm News / Announcement
Chambers Ranks Five Crowell Lawyers and Four Practice Groups in 2022 Europe Guide (March 18, 2022)
Firm News / Announcement
World Trademark Review Ranks Crowell & Moring in WTR 1000 (March 7, 2022)
Firm News / Announcement
"Selected IP/IT Topics in a Digital Environment," Crowell & Moring Webinar (February 24, 2022). Speakers: Kristof Roox, Jan-Diederik Lindemans, Sari Depreeuw, Maarten Stassen.
Putting An AI App To Work To Protect IP With Jan-Diederik Lindemans and Judith Bussé (podcast) Emerging Litigation Podcast (November 2, 2021)
Press Coverage
North Korea Counterfeit Crackdown; Banksy Trademarks Criticised; MARQUES Annual Meeting Update – News Digest World Trademark Review (July 9, 2021)
Press Coverage
IAM Ranks Crowell & Moring's Brussels Intellectual Property Group in Patent 1000 Gold Band (July 8, 2021)
Firm News / Announcement

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