Renowned international publications such as Managing Intellectual Property (MIP), Intellectual Asset Management (IAM), World Trademark Review (WTR) and Chambers Europe have awarded our firm repeatedly. Below is a selection of recent commendations.
IP STARS from Managing IP
Switzerland Patent Prosecution Firm of the Year 2025
«Rentsch Partner is a boutique which is highly recommended for patent protection and litigation work. The firm has European patent attorneys for technical fields such as mechanics, chemistry, computer technology, and electrical engineering. The key patent attorneys include Louis Lagler, Andrea Carreira, Alfred Köpf and Dany Vogel. Vogel, who specialises in computer technology, and Köpf, who handles biotechnology work, are non-permanent judges of the Swiss Federal Patent Court. For disputes, the firm has experienced lawyers such as Christian Hilti and Gregor Wild. The partners are supported by consultants, patent engineers and associates.»
IP STARS from Managing IP
Chambers Europe
What the team is known for
«Rentsch Partner is a boutique law firm handling the full range of IP matters. The law firm has particular strength in contentious cases, representing clients in patent litigation and arbitration. The team also advises on trade mark administration and strategy. The lawyers are able to provide services to clients from industries including biotechnology and mechanical engineering.»
Chambers Europe 2026
Strengths Provided by Chambers
«The team has strong focused expertise with global partners for localised support.»
The Rentsch Partner team demonstrates high professionalism and attentiveness. It has an extensive network of professional contacts with experience and an understanding of the specifics of different regions.
WTR
«On a global scale, clients do not get much better than Rentsch Partner AG, it truly is a one-stop shop for all IP-related legal questions. The firm serves clients’ needs with a knowledgeable team.” At the helm, Maria Iskic “leads a large and talented team and runs a slick operation. Maria seeks and listens to advice, is responsive and has a client following that speaks for itself. She is a delight to work with and has that magical personal brand essence.” Also earning effusive praise, Gregor Wild “excels across all aspects of trademark work, including strategic support, registrations, and defence of trademarks. His down-to-earth approach is greatly appreciated, and he provides clear guidance when manoeuvring the trademark landscape.” Adding further depth on the prosecution front are Fabio Versolatto, Suzana Häggi and Céline Schwarzenbach. Versolatto “provides valuable support in clarifying foreign trademark registrations and defending trademark rights. His recommendations are consistently reliable and have contributed to multiple successful enforcement outcomes. He also offers expertise in contract drafting and licensing matters related to trademarks.” Renowned for her sharp trademark expertise, Häggi is a go-to for representation before the IPI and WIPO. With deep international experience, she partners seamlessly with local counsel across jurisdictions to deliver practical, globally attuned advice. Schwarzenbach “can be highly recommended for the quality of her legal services professionalism and knowledge in her field, timely information, as well as a wide network of professional contacts around the world.»
WTR 1000 2026
IAM Patent 1000
«A leading IP boutique, Rentsch Partner combines legal and technical expertise under one roof, bringing together attorneys-at-law, patent attorneys and engineers to deliver fully integrated advice. Its close, hands-on approach sets it apart, with clients relying on the firm as a long-term partner for both legal and commercial decision-making. “The firm stands out for seamlessly combining technical excellence with sharp commercial insight. It delivers high-calibre support across the full IP lifecycle, from drafting through to enforcement and clients consistently highlight the team’s professionalism, responsiveness and depth of expertise across both legal and technical domains.”
On the technology side, Dany Vogel and Louis Lagler are key figures. Vogel is a go-to for ICT and software-related inventions, with deep expertise spanning telecommunications, AI, blockchain and fintech. “Dany is a standout practitioner who combines deep technical expertise with a highly client-focused approach. He has an exceptional ability to distil complex concepts into clear, robust patent claims.” Lagler complements this with strong capabilities in mechanical engineering and software-related technologies, including CAD, simulation methods and electrical engineering. His background in research and teaching underpins a structured and analytical approach to patent drafting and prosecution.
In the life sciences space, Andrea Carreira and Alfred Köpf form a highly experienced pairing. Carreira is a standout practitioner in chemistry and biotechnology, combining international research experience with in-house and private practice expertise. “Andrea is a top-tier specialist, delivering technically outstanding and highly strategic advice. She is exceptionally thorough, reliable and leaves no stone unturned in advancing her clients’ interests.” Köpf brings further depth across biotechnology, organic chemistry and medical technology, drawing on both academic and practical experience. “Alfred is a highly experienced and pragmatic adviser who is valued for his collaborative approach.” Together, they advise on complex patent strategies, including freedom-to-operate, opposition proceedings and the development of robust portfolios aligned with commercial objectives.
On the litigious side, Maria Iskic strengthens the firm’s integrated offering. She advises on IP, competition and ICT law, with a focus on contractual matters and dispute resolution, and regularly represents clients in arbitration and litigation.»
IAM Patent 1000 2026
Legal 500
«Rentsch Partner AG’s IP group is helmed by Maria Iskic, whose practice spans trade mark litigation, opposition work and brand strategy. She often acts for consumer brands, technology companies and fashion industry clients on cross-border disputes, coexistence arrangements and enforcement programmes. The ‘highly professional and technically excellent’ Dany Vogel and Philip Kerpen are further pillars of the team.»
Legal 500 Editorial commentary 2026
Testimonials – Collated independently by Legal 500 research team
«Rentsch is one of the well-established and highly respected law firms in Zurich. Rentsch has patent attorneys with a natural, medical and life science background, which was important for my case.»
«Rentsch Partner has a broad base and many different competencies and specialists who are brought in as required. This means we only have one point of contact, but key expertise is available. This makes the process easier.»
«The broad spectrum of knowledge and the always innovative thinking in the creation of IP documents is extremely helpful.»
«The team, consisting of Dany Vogel and Philip Kerpen, works in the field of electrical engineering, computer science and information technology. Both are proven experts and the best patent attorneys in Switzerland in these areas.»
«Dany Vogel and Philip Kerpen are always up to date with the latest developments in electrical, computer and IT. This is invaluable for clients. Their approach is highly professional and technically excellent.»
«As an entrepreneur, I found the Rensch team extremely flexible and fast. The team I encountered was very capable in mechanical engineering, electronics and software.»
«The team is very well organised and easy to work with. Very important is the deep technical knowledge among the team, which makes it easy to find the right individual to work with. It is very helpful that they have both litigators and patent attorneys in their team.»
«Alfred Köpf and Andrea Carreira are very good colleagues, with a deep scientific and legal knowledge, who are very responsive and easy to work with. In particular Andrea Carreira's chemical knowledge is amazing.»