Plesner has Denmark's strongest team of patent law attorneys. Our patent law experience, our availability, our business insight and our ability to understand and challenge technology enable us to provide the best patent law advice in Denmark.

Every year, we advise on and handle a significant number of patent cases. For example, Plesner represents a large number of original manufacturers in the pharmaceutical area, including nine out of ten of the largest pharmaceutical companies in the world.

Our services cover all aspects of patent law, particularly:

  • Cases concerning patent infringement and the validity of patents, utility models and SPCs
  • Cases concerning the ownership of inventions, including the rights of employees, researchers and co-inventors
  • Cases concerning the preservation of evidence
  • Preparation and negotiation of agreements, including R&D agreements and licence agreements
  • IP transactions
  • IP risk management
  • Strategic optimisation of global enforcement options
  • The EU Unified Patent Court

Many of our cases extend across borders, and we therefore collaborate with leading foreign patent legal advisors on a regular basis. These collaborations give us access to an international network that enables us to act smoothly, even outside Denmark.

Ratings

  • Within Intellectual property, Plesner is a first tier firm.

    "Plesner are the leading patent firm in Denmark. They offer a golden service to all their clients. They are a very integrated team. They help each other, are open to discussion and listen carefully, outstanding in cross-border cooperation"

    "Plesner is undoubtedly the top team in Denmark for IP, and in particular life sciences patents disputes. They are at the top of their game with excellent work, and dishing out excellent advice. Hugely collaborative and a pleasure to work with"

    "The IP team at Plesner really works as a team. The team’s involvement of external parties such as patent advisers and the management of the court cases is very professional and efficient"
    (2023)

  • Plesner is listed in "Band 1" as regards Intellectual Property. 

    Plesner is a law firm with a market-leading team offering notable expertise in all areas of IP law. The firm frequently acts for pharmaceutical companies on patent disputes. It is also highly active in trade mark litigation, often representing notable brands, with additional experience in parallel imports, design rights, trade secrets and copyright issues.

    "Plesner is the most well-placed law firm for pharmaceutical patent litigation in Denmark. It has a very good understanding of the pharmaceutical industry"

    "The team provides top-rated client service and commercial awareness"

    "The depth of the team's legal knowledge is impressive"

    "The lawyers are very responsive and swift in making sure that they confirm our requests"

    "Plesner is one of the best law firms dealing with complex IP matters"
    (2023)

  • Denmark Patent Disputes Firm of the Year

    Denmark Trademark Firm of the Year - Law Firms 

    Denmark Copyright & Design Firm of the Year

    Europe Patent Litigation Team of the Year (2023)

  • As the only law firm in Denmark, Plesner is ranked in Tier 1 as regards Copyright & Related Rights, Patent Contentious, Trade Mark Contentious and Trade Mark Prosecution - Law Firms (2022)
  • Within patent litigation and transactions Plesner is a Gold Firm. 

    The IP market is unanimous in its praise for Plesner, a full-service outfit that practises at the very summit of the Danish patent litigation scene:

    What impresses me the most is the depth and breadth of its expertise as well as the size of the team, which is just full of immensely talented litigators” 

    Plesner’s lawyers are exceptionally strong, highly skilled and without a doubt an excellent bunch” (2022)

  • Within Intellectual property, Plesner is a first tier firm.

    "The IP Team at Plesner are always delivering high quality work in a relaxed trust-based atmosphere. Compared to other law firms in Denmark, they have a unique ability to understand the commercial setting in which their clients act"

    "They can translate complex matters into advice that is easily understood and can be used internally to business stakeholders. All employees are highly skilled within their area of expertise and seniority and always act with high integrity and engagement regardless of the size and complexity of the assignment"

    "The Plesner team stand out as the largest patent litigation team in Denmark. They are a preferred choice by several pharma brands and by many other patent owners, eg. within the food industry, hearing aids and many other tech areas. They are thorough, open-minded and innovative in their approach. I think they are excellent at what they do"

    "Plesner’s IP team is a very skilled and at the same time pragmatic team. They are friendly, easy to work and communicate with and never over-complicate things" (2022)

  • Plesner is listed in "Band 1" as regards Intellectual Property.

    Market-leading team offering notable expertise in all areas of IP law. The law firm frequently acts for pharmaceutical companies on patent disputes. It is also highly active in trade mark litigation, often representing notable brands, with additional experience in parallel imports, design rights, trade secrets and copyright issues.

    "The Plesner team has an ever welcoming approach and a very high level of knowledge both of our company and of the IP regulation" (2022)

  • Plesner is listed in "Band 1" as regards Intellectual Property (2022)

  • Denmark Patent Contentious Firm of the Year

    Denmark Copyright & Design Firm of the Year (2022)

  • "Undoubtedly a top-tier firm", Plesner is home to "one of the best litigation teams in the business": "Its exceptionally skilled and diligent lawyers research and analyse complex technical cases thoroughly and can break them down into understandable pieces, which they successfully argue before the courts" (2021)

  • Within Intellectual property, Plesner is a first tier firm.

    "Plesner provides an outstanding service. The team are always on top of their game. They are dependable, trustworthy and not afraid to dive into and understand complicated technology. They are always accessible and have a down to earth and always friendly approach" (2021)

  • Market-leading team offering notable expertise in all areas of IP law. Frequently acts for pharmaceutical companies on patent disputes. Also highly active in trade mark litigation, often representing notable brands. Additionally experienced in parallel imports, design rights, trade secrets and copyright issues.

    "Plesner is definitely best-in-class for all the qualities that make a good law firm"

    "The lawyers are extremely responsive and you have immediate access to partners"

    "Within IP law, they are very knowledgeable about the international aspects and have strong contacts in other countries" (2021)

  • Plesner is listed in "Band 1" as regards Intellectual Property (2021)

  • Plesner is listed in "Tier 1" as regards Copyright & related rights, Patent contentious, Trade mark contentious and Trade mark prosecution (2021)
  • Within Intellectual property, Plesner is a first tier firm.

    "Denmark’s best known litigation firm retains a number of excellent staff so that it hold a premier position for IP matters"

    "Mikkel Vittrup and his team has significant experience with IP law within life science, especially when it comes to originators products, which is important to know for a client"

    "Plesner’s local knowledge can be taken for granted, so I will instead highlight their ability to work as a team and make a client feel part of the ground effort, which helps deliver better results"

    "Very strong knowledge of the legal area, and provides fast and reliable sparring even to complex issues, still with strong business understanding"

    "Personality, excellent verbal advocacy skills, deep legal knowledge" (2020)

  • Top-ranked team offering notable expertise in all areas of IP law. Best known for advising pharmaceutical companies on patent law issues, including on high-profile contentious cases. Represents notable brands in trade mark registrations and infringement, as well as in relation to copyright issues. Assists clients from the manufacturing, healthcare and technology sectors.

    "Understand the importance of clear and regular communication

    "The lawyers are very responsive and flexible in their availability"

    "A strong team at all stages of seniority

    "Excellent oral advocacy and quick thinking on their feet in hearings" (2020)

  • Plesner is listed in "Band 1" as regards Intellectual Property (2020)

  • "The Plesner team works cohesively and is always three steps ahead – there is no denying that they are brilliant at what they do." The litigation powerhouse has a stellar track record in pharmaceutical disputes, where it acts for some of the biggest names in the world (2020)

  • Within Intellectual property, Plesner is a first tier firm.

    "Plesner handles matters across all aspects of IP with particular strength in life sciences patent litigation" (2019)

  • Top-ranked team offering notable expertise in all areas of IP law. Best known for advising pharmaceutical and life sciences companies on patent law issues, including in high-profile contentious cases. Represents notable brands in trade mark matters and also in relation to copyright issues.

    "Very quick at grasping issues and their track records are brilliant. The team consists of extremely gifted lawyers"

    "Very proactive in offering solutions and presenting new cases" (2019)

  • Plesner is listed in "Band 1" as regards Intellectual Property (2019)

     
  • The "venerable, highly renowned" Plesner represents only originators in the pharmaceuticals field, a niche in which it has essentially cornered the market. The firm's proficiency in cross-border contentious mandates is unparalleled and its name is the absolute standard for rights holders seeking the finest courtroom representation. The forthcoming UPC is another area in which Plesner possesses significant insight, with the firm's partners having published a cutting-edge book on its future administration in 2017 (2019)

  • Plesner is listed in "Tier 1" as regards Patent contentious (2019)
  • Plesner is named "Patent Litigation Firm of the Year" for Denmark (2019)
  • One of the best known firms in Denmark, gold-tier unit Plesner is one of a kind: the singular representative of pharmaceutical originators on the Danish landscape, it possesses a mastery over the major challenges facing these players (2018)

  • Within Intellectual property, Plesner is a first tier firm.

    A market leader, Plesner offers "excellent and very client-focused service". The group handles the full range of IP matters, with particular strengths in the trade mark and patent fields (2018)
  • Plesner is listed in "Band 1" as regards Intellectual Property (2018)

  • "They are a full service firm and very homogeneous in their delivery. They are really skilled in a range of areas and I have a very positive impression of them" (2018)
  • Plesner continues to impress in our research, emerging as the leading player in the Danish market for patent work (2017)

  • Plesner is listed in "Band 1" as regards Intellectual Property (2017)

  • Top-ranked team offering notable expertise in all areas of IP law. Best known for advising pharma companies on patent law issues, including in high-profile contentious cases. Represents notable brands in trade mark matters and also in relation to copyright. Active on data protection and compliance instructions.

    "Plesner works very proactively - the team is highly available, has a deep bench of practitioners and is good at handling cross-border tasks" (2017)
  • Within Intellectual property, Plesner is a first tier firm.

    Plesner's "efficient" team has experience representing clients in patent and trade mark infringement matters before the Maritime and Commercial Court (2017)
  • A giant of the Danish market, full-service Plesner is home to a crack squad of do-or-die litigators whose polished performances in multi-jurisdictional spats have made the firm a premier destination for pharmaceutical originators in particular (2017)

  • Market-leading outfit offering long-standing experience and expertise across all areas of IP law. Highly regarded for its extensive experience in advising pharma originators on patent law. Strong trade mark practice trusted by high-profile clients. Its lawyers advise on prosecution, data protection and compliance issues.

    "This is a high-end, go-to firm for IP, with great attorneys"

    "Its lawyers have close knowledge of our procedures and portfolios, so we are able to act proactively on our matters" (2016)

  • Plesner sits comfortably at the apex of the Danish IP scene. It takes the lead on the vast majority of crucial patent suits on home soil – especially those with international relevance. It has practically cornered the market in terms of pharmaceutical originator work, with unmatched experience in clashes between innovators and generics (2016)

  • Plesner has an award-winning IP practice. Market feedback suggests it is arguably the best firm for IP litigation in Denmark. "They’re in their own small league" one rival admits. In particular, the firm is often seen in the most complex pharmaceutical patent cases in the country. "Traditionally strong in all IP" says another commentator (2016)
  • Plesner is listed in "Band 1" as regards Intellectual Property (2016)
  • Plesner is Managing IP's Danish Firm of the Year. Its "stable" IP team, often seen in pharmaceutical patent disputes, is widely respected.

    "A top class firm in patent litigation in Denmark" 

    Plesner is the grand firm in IP litigation. They handle things very well and are consistent" (2015)

  • "Mighty" full-service firm Plesner continues its reign at the apex of the market. The darling of many pharmaceutical giants, it is the only Danish firm to count three specialist patent litigators among its ranks. As such, it attracts the lion’s share of contentious instructions and is "probably the only firm in a position to turn down work" (2015)
  • Plesner is listed in "Band 1" as regards Intellectual Property (2015)

  • The firm’s IP practice is a powerhouse within every area of IP and advises and litigates on all IP law aspects such as patents, trademarks, copyrights, piracy and counterfeiting, designs, domains, consumer law, privacy policy law and marketing law (2014)

  • Plesner's "highly knowledgeable" seven-partner group is recommended for copyright, design, patent and trade mark litigation (2014)
  • "If there was a tier zero I would put Plesner in that as they are the best in the country for patent work,” says a colleague of the team at the full-service firm. Peers all agree that the team is "driving the work in this area" (2014)
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