IPrime Rentsch Kaelin

IPrime Rentsch Kaelin has European and Swiss patent attorneys who can deal with patent protection matters in the fields of technology, life sciences and chemistry. The firm provides litigation services through its legal arm IPrime Legal. 

Rudolf Rentsch is the key contact for patent disputes at the firm. He is also a part-time judge at the Federal Patent Court of Switzerland. Moritz Kälin oversees the patent prosecution department at the firm. The other experienced senior patent attorneys at the firm are Thomas Kretschmer and Otto-Martin Willy Bertschinger.

2024/2025

""They have efficiency, expertise and clients' connections. "They are very pragmatic and business connected."

2022 client testimonials

"The firm is precise in implementation, has the best references and the highest technical understanding."

"They are the best. Of all the patent litigation firms out there, they are second to none."

"Down-to-earth, sound advice and non-legal speak."

Case studies show patent disputes, in and outside the IP office, and portfolio management work. Alexander Grosse-Kracht left the firm in 2021.  

Trade mark case studies show prosecution and disputes work. Joachim Künsch joined the practice in 2021, while disputes lawyer Anne-Catherine Hahn left the firm in 2022.