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Learn more about us →The Central Division Milan rules on the procedural consequences of a parallel, final patent revocation by the Opposition Division of the European Patent Office. Since the patent was definitively and entirely (ex tunc)…
The Local Chamber Munich addresses the admissibility of procedural conditions in linked infringement and revocation proceedings. It is procedurally permissible for the defendant in an infringement action to file a…
In this procedural order, the Local Chamber Munich clarifies the distinction between an amendment of claim and a mere substantiation. It does not constitute an amendment of claim within the meaning of Rule 263 of the…
In this decision, the Local Chamber Vienna highlights the parties' duty of cooperation and the preclusion rules for evidence in revocation proceedings. The Rules of Procedure require that the counterclaim for revocation…
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Independent recognition of our work from the leading international directories and IP publications.
Daniel Alge and Rainer Beetz were recognized as Global Elite Thought Leaders in the category IP – Patent Agents & Attorneys. Elisabeth Zakl-Buchner was recognized as a Thought Leader in the category IP – Trademark Agents & Attorneys.
SONN was recognized as Austria's leading Trademark Prosecution Firm of the Year 2026.
SONN is the only Austrian firm ranked Tier 1 by IP STARS (Managing IP) in both Patent Prosecution and Trademark Prosecution. In addition, SONN was once again recognized as one of only five firms in Austria recommended for UPC Litigation.
SONN was recognized by the Financial Times and Statista as one of Europe's Leading Patent Law Firms 2026 and was listed among the recommended patent law firms in Europe.
Daniel Alge was recognized as an IAM Global Leader 2026 in Austria.
Daniel Alge, Rainer Beetz, Matthias Brunner, Johannes Strobl and Philipp Weinzinger were recognized by Managing IP as Patent Stars 2026 in Austria. Rudolf Griss and David Trauner were recognized as Rising Stars, and Marc Keschmann as a Notable Practitioner.
