Patent Litigation in Austria: 6 Essential Facts for 2026

Enforcing a patent in Austria is not like litigating in Germany, and it is not the same as going to the Unified Patent Court. Patent litigation in Austria is concentrated in a single specialised court in Vienna, yet the question of whether the patent is even valid is answered by a different body on a separate track. Get that split wrong and you can win an infringement trial while your patent is quietly revoked at the Patent Office, or lose months in the wrong forum. This guide sets out the six facts that decide how an Austrian patent case is fought and won in 2026.

Patent Litigation in Austria: Where Cases Are Heard

Austria concentrates patent disputes in one forum for the entire country. Civil actions for infringement of a patent, a supplementary protection certificate or a utility model — and the interim injunctions that go with them — can be brought only before the Vienna Commercial Court (Handelsgericht Wien), which holds exclusive first-instance jurisdiction nationwide.

Whatever city your infringer operates from — Graz, Linz, Salzburg or Innsbruck — the infringement suit is filed in Vienna. Appeals go to the Higher Regional Court Vienna (Oberlandesgericht Wien), and a final appeal on points of law reaches the Supreme Court (Oberster Gerichtshof, OGH).

Concentrating patent litigation in Austria in a single expert court was a deliberate choice: it builds technical competence on the bench and makes outcomes more predictable than a system spread across every regional court. Representation by an Austrian attorney is mandatory, and a patent attorney (Patentanwalt) typically works alongside counsel on the technical questions.

The Bifurcated System: Infringement vs. Validity

This is the single most important feature of the Austrian system, and it is where foreign litigants most often slip. Austria is bifurcated, like Germany: the Commercial Court decides infringement, but it does not finally rule on whether the patent is valid.

Validity is decided by the Nullity Department (Nichtigkeitsabteilung) of the Austrian Patent Office. A party that wants the patent gone files a nullity (revocation) action there; the Office examines it and issues a decision. That decision can be appealed to the Higher Regional Court Vienna, and onward to the Supreme Court on points of law.

There is one important bridge between the two tracks. When a defendant pleads invalidity as a defence, the Commercial Court first assesses for itself whether that defence is seriously arguable. If it is not, the court treats the patent as valid and presses on. If it is credible, the court will normally stay the infringement proceedings until the Patent Office — or the Higher Regional Court on appeal — has ruled on validity. For an accused infringer, that means the real fight over the patent’s survival happens in the Nullity Department, and it must be built on rigorous prior art from day one. The mechanics are the same ones we cover in our guide to the patent invalidity search.

Preliminary Injunctions: Austria’s Fast Lane

The preliminary injunction is the sharpest tool an Austrian patentee has. The Commercial Court can order interim relief quickly, and in clear cases it can stop an infringing product reaching the market long before the main trial concludes.

To get there, a patent owner generally has to show:

• A sufficiently secure legal position — the court weighs the likelihood of infringement and, critically, the strength of the patent against any invalidity attack already on the table.
• Urgency — interim relief is an emergency remedy, so a rights holder who sits on a known infringement weakens the case for it.
• Proportionality — the court balances the harm to the patentee against the harm an injunction would do to the defendant.

Because validity feeds directly into interim relief, a defendant who can raise a credible nullity argument early can blunt a preliminary injunction — another reason prior-art evidence matters from the opening move.

Remedies You Can Win

A successful patentee in Austria can obtain the familiar European set of remedies, grounded in the Austrian Patent Act and shaped by the EU Enforcement Directive (2004/48/EC):

• A permanent injunction stopping the infringing acts.
• Reasonable compensation for the use of the invention, available regardless of fault.
• Damages, or surrender of the infringer’s profits, where the infringement was negligent or wilful — at the patentee’s election.
• Rendering of accounts so the monetary claim can be quantified.
• Removal, recall or destruction of infringing goods and the means used to make them.
• Publication of the judgment at the infringer’s cost.

Austria also recognises wilful infringement, which can double the reasonable-compensation figure — a meaningful lever once an infringer has been put on notice by a cease-and-desist letter.

How an Austrian Patent Case Unfolds

A typical enforcement path looks like this, though every matter has its own wrinkles:

1. Pre-action work: confirm infringement, map validity exposure, and gather evidence — Austria allows applications to preserve and inspect evidence where there is a risk it will disappear.
2. Cease-and-desist: a demand letter can resolve clear cases and puts the infringer on notice, opening the door to enhanced compensation.
3. Interim relief: where the facts are strong and fresh, apply for a preliminary injunction at the Commercial Court.
4. Main infringement action before the Vienna Commercial Court.
5. Parallel nullity action at the Patent Office if the defendant attacks the patent — the infringement case may be stayed to await the result.
6. Appeal to the Higher Regional Court Vienna, and on points of law to the Supreme Court.

Because infringement and validity run separately, coordinating the court case with the Patent Office proceeding is where experienced counsel earns its fee. Our litigation-search teams support that evidence work on the ground in Vienna, from patent invalidation analysis to prior-art litigation search.

Austria, the EPC and the UPC

Jurisdiction mistakes start with the acronyms, so be precise. Austria has been a member of the European Patent Convention since 1979, so you can obtain protection by validating a European patent in Austria, and the national route through the Austrian Patent Office remains open as well.

Unlike Poland or Spain, Austria is a member of the Unified Patent Court, and there is a UPC local division in Vienna. That gives patent owners a genuine choice of battlefield. A classical European patent that has not been opted out of the UPC, and any European patent with unitary effect, can be enforced before the Vienna local division instead of the national Commercial Court — with the trade-off that a UPC central-division counterclaim can revoke the patent across all participating states at once. A patent kept on the purely national track, or opted out of the UPC, is litigated in the Vienna Commercial Court as described above. The EPO’s national law resource sets out the validation particulars.

If you are still at the filing stage, our companion guide on how to file a patent in Austria walks through the national, European and PCT routes that feed into the enforcement system here.

Enforce or Defend a Patent in Austria With PerspireIP

Whether you are asserting a patent or defending against one, patent litigation in Austria is won on the quality of the prior-art and infringement evidence behind it. PerspireIP builds that evidence base — invalidity searches, claim charts and freedom-to-operate analysis — for counsel across the country. Explore our Austria IP services hub or talk to our team about your case.

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