Patent Disputes in South Korea: IPTAB Validity Trials, the Patent Court and Infringement Actions

Patent disputes in South Korea are best understood as two parallel tracks that meet at the appellate level and again at the top. One track tests whether a patent is valid and how far its claims reach; the other decides whether a competitor has infringed and what remedy follows. Confusing the two is the most common early mistake, because the forum, the procedure and the people who decide are different in each. This guide sets out how the tracks fit together, drawing on the wider South Korea patents pillar for the surrounding framework.

The IPTAB validity and scope track

Questions about whether a Korean patent should have been granted, or exactly what its claims cover, are handled administratively rather than by a general court. They go to the Intellectual Property Trial and Appeal Board (IPTAB), a specialist tribunal that sits within the Korean Intellectual Property Office (KIPO). IPTAB is where an invalidation trial is brought to knock out a patent on grounds such as lack of novelty or inventive step, and where a scope confirmation trial is used to seek a ruling on whether a particular product or process falls inside or outside the claims. A scope confirmation decision is not the last word on infringement, though: the civil court decides infringement for itself and is not bound by the scope confirmation result, and the trial cannot itself grant an injunction or award compensation. Confirm the current effect of a scope confirmation ruling with local counsel before relying on it.

Because IPTAB is administrative, its panels are staffed by Administrative Patent Judges (trial examiners) with technical and legal qualifications rather than by judges of the ordinary courts. That specialisation is a large part of why the validity question is routed here first. A party unhappy with an IPTAB decision does not appeal into the civil court system; the appeal runs to the Patent Court of Korea, described below. Filing, official fees and the applicable time limits are set by KIPO and change from time to time, so confirm the current position with KIPO or local counsel rather than relying on a figure quoted online.

The Patent Court of Korea and the Supreme Court

The Patent Court of Korea is a specialised court that hears appeals from IPTAB decisions. It reviews validity and scope rulings and is equipped to deal with the technical subject matter that patent cases throw up. A further appeal on points of law lies to the Supreme Court of Korea, which sits at the apex of both tracks.

It is worth stressing what the Patent Court is not. It is not a general first-instance venue for suing an infringer, and it is not the same institution as IPTAB even though the two are closely linked in the validity chain. Its role in this track is appellate: it checks the administrative decision that came before it.

Infringement actions in the civil courts

An action to stop infringement and to recover compensation is a separate civil proceeding. These claims are brought in the ordinary civil courts, where first-instance jurisdiction has been concentrated in a small number of specialised district courts (Seoul Central, Daejeon, Daegu, Busan and Gwangju), so that judges with patent experience hear the cases, with the Seoul Central District Court additionally available as a concurrent venue. Since the jurisdictional concentration reform, appeals from those first-instance civil judgments are now channelled to the Patent Court of Korea as the exclusive appellate route, which is one of the points at which the two tracks converge. The precise allocation of venues has shifted over time, so confirm the current position with the Korean courts or local counsel.

In practice a dispute often runs on both tracks at once. A defendant sued for infringement will frequently file an invalidation trial at IPTAB to attack the patent it is accused of infringing, so the same commercial fight is being contested administratively and in the civil courts in parallel. Coordinating those proceedings, and the timing between them, is a strategic matter for local counsel. The way these actions interact with parallel filings in other countries is a recurring theme in cross-border enforcement, since a Korean judgment does not by itself reach infringing acts abroad.

Preliminary injunctions and interim relief

Where a patent owner needs to act before a full trial concludes, interim relief may be available. The Korean civil courts can grant a preliminary injunction to restrain allegedly infringing activity pending the substantive decision, subject to the applicant showing the necessary grounds and often to providing security. Interim relief is discretionary and fact-sensitive, and the evidentiary threshold, the security arrangements and the time it takes to obtain an order all vary with the case. Do not treat any single reported timeframe as a fixed rule; confirm the current requirements with the Korean courts or a qualified local practitioner before relying on interim relief as part of a strategy.

Getting help with a Korean patent dispute

Because validity and infringement run on separate tracks, and because interim relief turns on precise procedural steps, a Korean patent dispute is difficult to run without qualified local representation. IPEnvoy is not a law firm and does not provide legal advice; this is general information only. Confirm the current position with KIPO and the Korean courts and take advice from a qualified local IP professional before acting. If it would help, IPEnvoy can introduce you to vetted Korean IP counsel experienced in IPTAB trials, Patent Court appeals and infringement litigation, so your matter reaches the right specialists from the outset.