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Partner: Rudolf A. Rentsch
Partner: Moritz A. Kälin
Quick facts
Firm - Year of Establishment

2017

Number of Partners

6

Total Number of IP Practitioners

11

Languages Spoken at the Firm

German, English, French, Italian, Chinese, Finnish, Czech

Key practice areas
Patent disputes
Trade mark
Patent
Patent prosecution
Firm overview

Boutique firm IPrime fields a team of leading patent attorneys and attorneys-at-law with extensive experience in dealing with complex national and cross-border intellectual property matters across a broad range of technologies.

Relying on a unique combination of experienced business lawyers and litigators, patent attorneys and technology experts, IPrime is able to offer high-end legal and strategic advice and advocacy services in connection with the protection and commercialization of innovations, investments into technology, as well as complex IP and commercial disputes. Key strengths of the team are its independence and close collaboration between Swiss and European patent attorneys with a profound understanding of technology and science (including AI, robotics, big data, cyberphysical systems and block chain, pharmaceuticals, life sciences, chemicals and biotechnology as well as medical technology), and highly experienced dispute resolution specialists, who routinely represent parties in legal proceedings before courts, authorities and arbitral tribunals. IPrime has for years regularly handled a relevant share of all patent litigation matters in front of the Swiss Federal Patent Court.

As a part-time judge at the Federal Patent Court and experienced patent litigator, Dr. Rudolf A. Rentsch is involved in many high-stake patent cases in various technology sectors, while Dr. Moritz Kälin, Thomas Kretschmer and Martin Willy bring a wealth of experience in their respective scientific fields as well as in all aspects of patent law. Dr. Rudolf A. Rentsch, Dr. Ronny D. Banchik, Dr. Raphael Zingg and Ernst J. Brem are experienced commercial lawyers, advising clients in contract negotiations and representing them particularly in IP disputes. This interdisciplinarity, as well as the many years of experience which its lawyers gained in other firms and in in-house roles in the technology sector, allows IPrime to provide cutting-edge legal and strategic support to domestic and international clients at the intersection of technology and law.

Other key differentiators are the boutique structure and the discretion and substantially reduced risk of conflicts of interest, thanks to which IPrime can provide a broad range of services in contentious matters, from counsel mandates in litigation and arbitration, over strategic advisory in IP matters to settlement facilitation in situations requiring not only legal knowledge but also a thorough understanding of the underlying technical and commercial issues.

IPrime’s IP department covers both patent prosecution and patent litigation cases at Swiss, European and international level, providing strategic and legal advice with respect to the protection of intellectual property, whether under patent, trademark, copyright, trade secret, design or unfair competition laws. In particular, IPrime frequently advises IP departments of large leading global high-tech companies as well as SMEs, universities and start-ups in all areas of IP. IPrime also offers comprehensive services for the registration and administration of patent and trademark portfolios throughout Europe and overseas. In addition, IPrime’s patent attorneys and lawyers regularly assist clients in complex IP disputes, particularly in the patent area, and have accompanied a number of companies in patent cases in the U.S., China, Japan as well as many countries within Europe, in particular Germany and England. IPrime also routinely advises on the commercialization of intellectual property and related financing and structuring considerations and has set up a partnership with a large Swiss tax and accounting firm to assist companies in the tax-optimal structuring of patent portfolios, in accordance with the so-called patent boxes into Swiss law. Since many years, IPrime also runs a China desk and has strong connections to Japan.

IPrime has offices each in the heart of the cities of Zurich and Dusseldorf and since summer 2021 in Liechtenstein.

Network Memberships
  • AIPPI (International Association for the Protection of Intellectual Property)
  • Arbeitsgemeinschaft Geistiges Eigentum & Medien im Deutschen Anwaltverein
  • Asia Society Switzerland
  • EPI (Institute of Professional Representatives before the European Patent Office)
  • Europa Institut at the University of Zurich
  • FICPI (International Federation of Industrial Property Agents)
  • I3PM (International Institute for Management of Intellectual Property)
  • INGRES (Institute for Intellectual Property Rights)
  • International Technology Law Association
  • LES (Licensing Executives Society - Association for Licensing, Technology Transfer and Intellectual Property)
  • SCS Swiss Chemical Society
  • Silicon Valley Arbitration & Mediation Center (SVAMC)
  • Swiss Association of Judges (SVR-ASM)
  • Swiss Bar Association
  • SWISS ENGINEERING STV (Swiss professional association for engineers and architects)
  • Swiss Forum for Communication Law
  • Swiss-Chinese Chamber of Commerce: SCCC
  • swissICT (Swiss Association for Information and Communication Technology)
  • UNION-IP (Union of European Practitioners in Intellectual Property)
  • VESPA (Swiss Association of European Patent Attorneys in private practice)
  • VSP (Association of Swiss Patent and Trademark Attorneys)
  • Zurich Association of legal practitoniers (ZJV)
  • Zurich Bar Association
Practice Areas & Sector Specialisations

Key IP Areas

Copyright & related rights, Designs, Intellectual property (contentious), Intellectual property (prosecution), IP transactions, ITC litigation, Life sciences IP, Patent, Patent contentious, Patent prosecution, Trade mark, Trade mark contentious, Trade mark prosecution

Key Sector Expertise

Aerospace, Artificial intelligence, Arts, Automotive, Biotechnology, Chemical, Computer technology & services, Defence, E-commerce, Electrical, Electronics, Fashion & luxury goods, Financial services, Food & beverage, Gaming, ICT & software, Internet, Life sciences, Logistics, Manufacturing, Mechanical, Media, Medical device, Pharmaceutical, Renewable energy, Robotics, Technology hardware, Tobacco, Universities & research

Address:
Hirschengraben 1
Zurich 8001
Tel:+41 442 296 060 Fax:+41 44 229 60 50 Email:Contact Us Web Address:https://www.iprime.law/en

IPS Sponsored

  • Sponsored by IPrime Rentsch Kaelin
  • Sponsored by IPrime Rentsch Kaelin
  • Sponsored by IPrime Rentsch Kaelin
2026 Edition
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Overview

IPrime Rentsch Kaelin has European and Swiss patent attorneys who resolve complete prosecution matters in technology, life sciences and chemistry. The firm provides litigation services through its legal arm, IPrime Legal.  

Notable patent practitioners: Rudolf Rentsch, Moritz Kälin, Thomas Kretschmer and Otto-Martin Willy Bertschinger. 

Linked Reviews
Patent

The firm represented MyStromer AG in litigation and filing before the Swiss Federal Patent Court. It also litigated on behalf of a biotechnology client before the Court of Milan. Contractual advice and prosecution services featured in 2024.  

Trade mark

Case highlights include opposition for a consultancy firm before the EUIPO with litigation and prosecution dimensions. It also acted for a renewable energy firm in portfolio management on the domestic market.  

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