With expertise representing both plaintiffs and defendants, Gleiss Lutz is regularly seen handling infringement and nullity proceedings, as well as UPC cases. Stefan Weidert acts as the overall head of IP, while Matthias Sonntag oversees the focused patents offering. Cross-border work continues to grow steadily.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘Very responsive and interested to deeply understand the technical subject matter. Easy communication and collaboration, easy to work with.’
- ‘Matthias Sonntag and Mischa Krumm: very focused and enthusiastic, deep legal knowledge.'
- 'Matthias Sonntag is a very strong litigator – clear, calm and convincing.'
- 'Overall, the team feels more pragmatic and client-friendly than many competitors.'
- 'Stefan Weidert brings real strategic value, especially when cases touch on broader tech and licensing issues.'
Key clients
- Supponor (now TGI Sport)
- TRUMPF
- Hexal AG
- D-Link Corp
- PAX Global Technologies
- Sandoz AG
- CeraCon
- Topcon Corp.
- Procter & Gamble
- Kärcher
Work highlights
Defended Hexal in its patent dispute with Biogen concerning generic versions of multiple sclerosis drug Tecfidera.
Representing Trumpf before the UPC in actions against IPG concerning industrial laser technology.
Defended PAX and CCV before the UPC in a patent dispute with Nokia concerning 4G patents.
Practice head
Stefan Weidert; Matthias Sonntag
Other key lawyers
Mischa Krumm; Benedikt Burger; Herwig Lux