Prüfer & Partner > München, Germany > Firm Profile

Prüfer & Partner

Intellectual property > Patent litigation: patent lawyers Tier 3

Prüfer & Partner offers extensive expertise in contentious proceedings, particularly in opposition, nullity and infringement actions, in which it regularly appears before German and European authorities such as the EPO, DPMA and Federal Patent Court. The practice head trio consists of Dorothea Hofer (physics, medical technology, semiconductors), Jürgen Feldmeier (automotive, medical and precision engineering) and Andreas Oser (chemistry, pharmaceuticals, life sciences, biotechnology, optics).

Practice head(s):

Dorothea Hofer; Jürgen Feldmeier; Andreas Oser


‘The Prufer team works hand in hand both internally and externally with colleagues in an exemplary manner. They perfectly pass the ball to each other.’

‘Internally, cross-disciplinary questions are discussed quickly and easily and feedback is given. Questions are recorded and answered, regardless of who you ask and whether the contact is an expert or not.’

‘The advice is given on what is best for the client and not on what the client wants to hear.’

‘High commitment and availability.’

Key clients

SK On, SK Innovation, SK Inc

Brother Industries, Ltd.

Knorr-Bremse Systeme für Schienenfahrzeuge

Knorr-Bremse Systeme für Nutzfahrzeuge

Hymmen GmbH Maschinen- und Anlagenbau

Multipond Wägetechnik GmbH

Nipro Corporation

B Braun Melsungen AG

Biedermann Technologies GmbH & Co. KG

EOS GmbH Electro Optical Systems

ATOMA Gesellschaft für automatische Waagen GmbH


Wachtel GmbH

Wachtel ABT GmbH

Pleaser USA

Qubig GmbH

Heidolph GmbH & Co. KG

Pathy Medical LLC

Work highlights

  • Representation of Hymmen GmbH Maschinen- und Anlagenbau in several disputes against a Spanish and an Italian competitor before the Düsseldorf Higher Regional Court and, parallel defense of these patents before the Federal Patent Court and before the EPO.
  • Advising Brother Industries on patent disputes, consisting of several patents and utility models from patent applications, before the Munich Regional Court and Higher Regional Court, the Düsseldorf Regional Court and Higher Regional Court, the Federal Patent Court and the European Patent Office (BPatG) as well as the European Patent Office (EPA) due to infringement of ink cartridge protection rights through compatible Pelikan cartridges.

Intellectual property > Patent prosecution Tier 3

Opposition and audit proceedings form just as much a part of Prüfer & Partner's daily case load as does the preparation of patent applications for the German and international markets; here, the team is particularly active for clients from the US, Japan, China and South Korea. Dorothea Hofer (physics, medical technology, electronics), Jürgen Feldmeier (vehicle technology, medical technology, sports equipment) and Andreas Oser (chemistry, pharmaceuticals, life sciences, biotechnology) jointly head the practice.

Practice head(s):

Dorothea Hofer; Jürgen Feldmeier; Andreas Oser

Other key lawyers:

Christian Einsel; Christian Gärtner; Susanne Sonnenhauser


‘Collaboration at eye level, courteous, experts in every area that affects us.’

‘Excellent cooperation, well-trained and efficient team.’

‘Collaboration at eye level, which is very valuable. Abstract topics are explained in a way (and several times with great patience) that we always find a way to protect an innovation appropriately or to be able to enforce an intellectual property right.’

‘The overall level of service is excellent. Response is always very quick and appropriate and the ability to understand and analyse legal and technical issues is sufficiently high.’

‘The team around Jürgen Feldmeier and Dorothea Hofer is highly qualified and very agile. Dealing with colleagues is also very pleasant on a human level. Communication is fluid and very transparent both in terms of cost structure and in terms of practical feasibility and next steps. We are very satisfied with the collaboration with our colleagues.’

‘Jürgen Feldmeier is technically strong, very practical, and offers regular follow-ups on the status.’

‘Dorothea Hofer: Very well versed in technicalities, very complete assessments of legal issues.’

‘I really appreciate Jürgen Feldmeier because he has exceptional professional expertise and is always solution-oriented and very friendly in his direct client contact.’

Key clients

EOS GmbH Electro Optical Systems

Biedermann Technologies GmbH & Co. KG

Brother Industries, Ltd.

Multipond Wägetechnik GmbH

Hymmen GmbH Maschinen und Anlagenbau

Freiberger Compound Materials

Knorr Bremse AG

Heidolph Instruments GmbH & Co. KG

Toray Industries

Terumo Corporation

Knauf Insulation

BHS Technologies

Nipro Corporation

Heusch GmbH

QRSkin GmbH

CloudMinds (Shanghai) Robotics Co. Ltd.

Everspin Corp.

SK On Co., Ltd.

SK Innovation

SK Inc.

Webasto SE

Industry-University Cooperation Foundation Hanyang University

LOESCH Verpackungstechnik GmbH + Co. KG



Tsann Kuen (Zhangzhou) Enterprise Co., Ltd

Evomedis GmbH

ViiV Healthcare UK (No. 3) Limited

Novartis Group

Korea Research Institute of Chemical Technology

Toppan Printing Co., Ltd.

Suzhou Abogen Biosciences Co., Ltd.

A.L.M.T. Corp.

Microbium D.o.o.

Japan Aviation Electronics. Ind. Ltd.

Abestype Ltd.

Qubig GmbH

Work highlights

  • Advice from SK On Co., Ltd. in patent applications in Europe as well as on strategic and portfolio issues.
  • Advice and support for Hymmen GmbH Maschinen- und Anlagenbau on global patent strategy, including invention research, opposition proceedings and active and passive dispute proceedings.

Prüfer & Partner mbB is one of the most renowned German IP law firms. It protects its clients’ ideas, inventions and product developments worldwide and enforces their claims in court – whether technical inventions or other IP rights. Today, almost 60 employees – including 21 patent attorneys, lawyers and patent specialists – work for the IP boutique.

Prüfer & Partner was founded in 1972 and quickly developed into an internationally oriented law firm with a focus on IP protection. A successful generation change took place between 1998 and 2002 with the succession of patent attorneys Dorothea Hofer, Jürgen Feldmeier and Andreas Oser.

Prüfer & Partner is thus an established and highly respected medium-sized law firm with a stable global partner network. The firm advises clients on the filing of IP rights, supports them in all IP matters and defends their IP rights in court.

At Prüfer & Partner you can expect a strong and carefully selected community of attorneys-at-law, patent attorneys and technical specialists. The firm represents the interests of its clients at the highest level. Prüfer & Partner is familiar with complex and demanding cases and works with utmost dedication.

Diligence and competence play an important role in intellectual property law. The attorneys of Prüfer & Partner work strictly according to German quality standards: thoroughly, on time and cost-efficiently.

The Asian region has been playing an increasingly important role in the global economy for many years. It has developed into an important production location for both large and medium-sized companies. At the same time, China in particular is rapidly catching up in terms of innovative business models and products. Prüfer & Partner continuously cultivates business in China and in the Asian countries – especially in Japan. Counselling clients from these countries regarding their IP affairs in Europe and supporting European clients doing business in Asia is a strength of Prüfer & Partner’s practice.

Based in Munich, the German centre of intellectual property law, Prüfer & Partner sees itself as a one-stop-shop IP boutique for its clients.

Department Name Email Telephone
Mechanical engineering Jürgen Feldmeier
Electrical engineering, electronics Dorothea Hofer
Physics, optics Dorothea Hofer
Medical technology Jürgen Feldmeier
Medical technology Dorothea Hofer
Chemistry Andreas Oser
Biochemistry/biotechnology, life science, pharmacy Andreas Oser
IP litigation Dorothea Hofer
IP litigation Jürgen Feldmeier
Customs action Jürgen Feldmeier
Photo Name Position Profile
Jürgen Feldmeier photo Mr Jürgen Feldmeier Managing Partner
Dorothea Hofer photo Dr Dorothea Hofer Managing Partner
Andreas Oser photo Dr Andreas Oser Managing Partner


For us, this word is not an empty phrase that is often used in marketing. For us, diversity means variety in the truest sense of the word. Diversity in language, in our firm we speak nine other languages besides German and English. Diversity in ideas. Every team member is involved in the further development of the firm, no one has to hide their ideas and suggestions. Growth is only possible through openness and freedom of thought. Diversity in culture. We live in an international world, in an international industry and we work in a law firm with different nationalities. It is this diversity that inspires us every day. It motivates us on every day to look at the world with open eyes. It enables us to think outside the box every day and to solve our clients’ problems and cases with foresight.

We strive together every day to create an open and tolerant environment in which every single employee, every client, every supplier feels comfortable in their differences – regardless of origin, gender, religious affiliation, sexual orientation or world view. In our office, older and younger colleagues with or without impairments, from near and far, work together as a matter of course. We not only appreciate and welcome this diversity, we encourage it.

Corporate Social Responsibility

Taking on social responsibility is a major concern for us at Prüfer & Partner. That is why we regularly get involved in social projects and give part of our success back to society in the form of donations.

That is why we regularly support the following projects:

  • SOS-Kinderdorf e.V.
  • Dorsten GmbH Workshop for the Blind
  • Süddeutsche Zeitung Advent Calendar

2021, we were particularly concerned about supporting the victims of the floods, which swept across western Germany in July of the year. The suffering is unimaginably great and we hope that with our donation to Deutschland Hilft e.V. Donation Flood Relief we have made at least a small contribution to the reconstruction and support of the people on the ground.