Willful Blindness and Korea's Quintuple Enhanced Damages: Drawing the Line

Introduction

Suppose a company is sued by a competitor for patent infringement, and the court finds actual damages of KRW 1 billion (roughly USD 700,000). If the panel then finds that the defendant's infringement was willful, the award can be enhanced up to fivefold — as much as KRW 5 billion. That is the basic architecture of Korea's enhanced-damages regime under the Patent Act, first introduced in 2019 and expanded in 2024.

Enacting the statute, however, did not settle how it would be applied. Korean courts and commentators spent years divided over how far the word "willful" should reach — where ordinary carelessness ends and culpable appropriation begins. This piece traces how that question has been resolved, using the evolution of the underlying U.S. case law and a 2024 Patent Court decision as the throughline.

1. Korea's Enhanced-Damages Regime Today

Article 128(8) of the Korean Patent Act allows a court, where infringement of a patent or an exclusive license is found to be willful, to award up to five times the damages otherwise proven. The cap started at treble damages when the provision took effect in January 2019, and was expanded to a fivefold cap by a February 2024 amendment (effective August 2024). Korea now sits alongside China at the top of the global range for statutory multipliers on willful IP infringement.

Article 128(9) sets out eight factors courts must weigh in setting the actual multiplier:

1. whether the infringer held a position of economic dominance over the rights holder
2. the degree to which the infringer was aware of, or recklessly disregarded, the risk of infringement
3. the extent of harm suffered by the patentee or exclusive licensee
4. the economic benefit the infringer derived from the infringement
5. the duration and frequency of the infringing conduct
6. any criminal penalties, such as fines, imposed for the infringement
7. the infringer's financial condition
8. the infringer's efforts to remedy the harm

In other words, the threshold for "willfulness" itself is set fairly broadly, but once willfulness is found, the actual multiplier is not left to unstructured judicial discretion — it is anchored to a checklist of statutory factors.

2. How U.S. Case Law Got There

To understand where Korea's regime came from, it helps to trace the history of "willful infringement" under U.S. patent law — the original template for statutory enhanced damages. The standard has swung through three distinct eras, each tracking a different innovation-policy mood.

Phase one (1983, Underwater Devices): The Federal Circuit imposed an affirmative duty of due care on anyone who became aware of another's patent — obtaining a competent opinion of counsel before proceeding, among other things. Under that regime, a defendant could be found willful for having simply failed to investigate, even absent any bad faith, and companies responded by over-investing in defensive freedom-to-operate opinions for every new product.

Phase two (2007, In re Seagate Technology): Sitting en banc, the Federal Circuit scrapped the affirmative-duty rule and adopted a two-part test: a patentee first had to show that the infringer's conduct was objectively reckless, and then that the risk was known or so obvious it should have been known to the infringer — all under a heightened clear-and-convincing-evidence standard. In practice, this objective prong let a defendant escape enhanced damages by conjuring up a reasonable-looking invalidity or non-infringement defense after the fact, even one the court ultimately rejected, regardless of what the defendant actually believed at the time it infringed.

Phase three (2016, Halo Electronics v. Pulse Electronics): The Supreme Court discarded Seagate's rigid two-part test and redirected the inquiry back to the infringer's subjective knowledge and culpability at the time of the infringing conduct, rather than to defenses cooked up for trial. The Court also relaxed the evidentiary standard to the ordinary civil preponderance-of-the-evidence standard. And under 35 U.S.C. § 298, enacted as part of the 2011 America Invents Act, a defendant's failure to obtain an opinion of counsel cannot, by itself, be used to prove willfulness.

The lesson from this arc is that the closer the inquiry stays to what the infringer actually believed at the time it acted, the more the regime does what it is supposed to do — and that where the burden of proof is set matters as much as the substantive standard itself.

3. Korea's Interpretive Debate: How Far Does "Willful" Reach?

For some time, Korean courts and scholars pulled in different directions on what "willful" in Article 128(8) actually meant. Some argued it should be read as broadly as intent is read under the Civil Act, reaching conditional intent (dolus eventualis). Others argued that, to give the regime real deterrent bite, it should extend to gross negligence, as in the U.S. approach. Still others, worried about chilling legitimate R&D, argued the provision should be confined to cases of outright, intentional misappropriation from the start. Because the answer could swing outcomes dramatically case by case, the bar needed a clarifying decision.

4. The Cookware Lid Case: Where the Court Drew the Line

That clarifying decision came in the Patent Court's October 31, 2024 judgment in Case No. 2023Na11276. The facts were as follows.

A small kitchenware manufacturer (the plaintiff) held a patent on a sealed cooking-vessel lid using a particular gasket structure. The defendant, which had a business relationship with the plaintiff, learned of the patent as early as 2015 and entered licensing negotiations over royalties — negotiations that ultimately broke down. Yet starting around November 2015, while those negotiations were still ongoing, the defendant began manufacturing and selling vacuum pots embodying the patented feature without authorization. The plaintiff sent a cease-and-desist letter in February 2019, which the defendant ignored, continuing sales; in June of that year the defendant went on the offensive, filing both an invalidity petition and a request for a negative scope-of-right confirmation. Both were rejected by the Korean Intellectual Property Trial and Appeal Board in December 2020, and the defendant lost the follow-on appeal as well, with judgment becoming final in August 2021 — yet it kept selling the product until October 2022.

On these facts, the Patent Court found willful infringement. The significant part of the decision is that the court expressly defined what "found to be willful" means: an infringer acting while aware that its conduct will result in patent infringement, a definition that captures not only dolus directus (direct intent) but also dolus eventualis — conditional or contingent intent. It bears noting, however, that this case was decided under the pre-2024 version of the statute, when the cap was still three times damages, not the current fivefold cap. Weighing the Article 128(9) factors — the defendant's superior bargaining position, the degree of willfulness, the duration and frequency of infringement, the economic benefit obtained, its financial condition, and its remediation efforts — the court awarded a 2x multiplier. That is a double enhancement under the old 3x cap, not under today's 5x cap, and the distinction matters for anyone citing the case going forward.

The court also declined to credit the defendant's reliance on a patent attorney's non-infringement/invalidity opinion or on a change in management as evidence cutting against willfulness. The opinion had been prepared well after the infringement began, expressly disclaimed any binding legal effect, and was ultimately proven wrong by the litigation itself.

5. Conditional Intent vs. Advertent Negligence: Drawing the Line

The most consequential aspect of this decision for practice is that it imported a distinction long used in Korean criminal law — between conditional intent (dolus eventualis) and advertent (conscious) negligence — into the patent-infringement context. Under Korean Supreme Court precedent (e.g., its June 25, 1985 decision, Case No. 85Do660), what separates the two is not whether the actor recognized the possibility of the result, but whether the actor's state of mind reflected acceptance, or acquiescence, in that result occurring.

Mapped onto patent infringement: a company that knew of a competitor's patent, attempted a design-around, concluded in good faith "this should clear the claim," and launched — only to be found infringing later — will generally, even if that judgment was careless, fall on the advertent-negligence side of the line, closer to gross negligence. By contrast, a company that recognized a substantial risk of infringement, calculated that the expected upside outweighed the eventual damages exposure, and knowingly proceeded anyway has conditional intent. The latter treats infringement as a calculated cost of doing business — precisely the conduct the fivefold enhanced-damages regime is built to target.

U.S. case law offers an analogous concept: willful blindness, which treats deliberate avoidance of confirming a known risk as tantamount to actual knowledge. Korea, as a codified civil-law jurisdiction, has less room to construct that kind of judge-made fiction of intent from case law alone. As a practical matter, Korean practitioners tend to treat evidence of organizational concealment not as intent in itself, but as circumstantial evidence supporting a finding of conditional intent — a more workable approach within the civil-law framework.

6. A Difference in Philosophy: Deterrence or Make-Whole Relief?

Korean and U.S. courts appear to approach this remedy with somewhat different centers of gravity. U.S. punitive damages read, on balance, as primarily a matter of judicial sanction and deterrence — punishing morally blameworthy conduct as such. Korea's enhanced-damages provision, by contrast, seems to combine that deterrent purpose with a genuine compensatory goal: making the rights holder whole. Intangible harm from infringement, lost first-mover advantage, and litigation costs are all things ordinary damages calculations in Korean civil litigation tend to under-capture, and enhanced damages appear to plug some of that gap. The granular, almost accounting-style character of the eight Article 128(9) factors is consistent with that compensatory function. U.S. courts, by contrast, tend to focus less on whatever shortfall the patentee may not be fully compensated for and more on the subjective egregiousness and moral culpability of the infringing conduct itself, calibrating the multiplier to the sanction warranted — an exercise of the court's own equitable discretion. That framing makes a discretionary multiplier a natural fit. Under Korean law, moreover, even conduct that falls short of "willful" — conscious gross negligence — can, depending on the facts, still be found to constitute willful infringement in a given case. That said, both systems in fact blend deterrence and compensation to some degree, and the distinction above is best read as a difference of emphasis rather than an airtight doctrinal divide.

7. The Defensive Value of Opinion Letters — and Its Limits

In practice, the most common defense to enhanced damages is a non-infringement or invalidity opinion from patent counsel. But in the cookware lid case, the fact that the court's rejection of that defense referenced not only the opinion's late timing — prepared, notably, after the litigation had already turned against the defendant — but also its boilerplate disclaimer language, has sent a real signal through the practicing bar. The more accurate reading, though, is that the boilerplate disclaimer language itself was not the problem; rather, the court weighed the years-long delay between the start of infringement and the opinion's preparation, together with the defendant's continued sales even after final judgment in the invalidity and scope-of-right proceedings went against it.

Even so, given that the court's decision referenced the presence of standard limitation-of-liability language, practitioners should expect the standard for evaluating an opinion's defensive value to sharpen — moving away from the mere presence or absence of boilerplate disclaimers and toward, as U.S. case law does, the substantive quality and timeliness of the analysis: whether it was prepared before the infringement began, whether it included a genuine claim chart, and whether it was authored by outside counsel independent of the client with genuine expertise in both patent law and the relevant technology. It would also be worth considering, along the lines of 35 U.S.C. § 298, codifying a rule that the mere absence of an opinion of counsel cannot itself be held against a defendant on the willfulness question.

8. The Structural Proof Problem — and the Rise of "K-Discovery"

The declining defensive value of opinion letters does not make a plaintiff's burden any lighter. Proving an infringer's conditional intent directly is close to impossible; plaintiffs are left to persuade the court through circumstantial evidence — how the defendant responded to a cease-and-desist letter, the parties' prior dealings, and the like. The evidence that would nail down those circumstantial facts, however, typically sits inside the infringer's own organization, and Korea, lacking anything like U.S.-style discovery, has historically given plaintiffs no real mechanism to reach it. A 2025 survey by Korea's patent office (now elevated to the Intellectual Property Administration) and the Korea Venture Business Association found that 73% of small and mid-sized companies that had suffered technology misappropriation identified difficulty gathering evidence as their single biggest obstacle in litigation.

Proposals to close that information asymmetry through a "Korean-style discovery" (K-Discovery) mechanism have circulated for more than a decade without gaining traction, largely due to industry opposition. That opposition has tended to rest more on apprehension than on airtight logic — much of it centered on the fear that an opaque foreign non-practicing entity (NPE) could sue a Korean conglomerate not really to win, but to use discovery as a lawful route into sensitive R&D files or trade secrets. Groups such as the Federation of Korean Industries have in fact opposed the mechanism on exactly those grounds, citing exposure to NPE targeting and rising litigation costs. The counterargument is that NPEs, by definition, do not manufacture or sell products and monetize patents rather than technology as such — meaning they would have comparatively little use for a defendant's R&D files or trade secrets to begin with, which suggests the fear may be somewhat overstated.

The breakthrough came on January 29, 2026, when the National Assembly passed amendments to the Act on the Promotion of Mutually Beneficial Cooperation Between Large Enterprises and Small and Medium Enterprises (the "SME Cooperation Act"). For damages actions arising from misappropriation of technical data, the amendment introduces, for the first time in Korean law, three mechanisms:

1. fact-finding investigations conducted by court-appointed experts
2. court orders preserving evidence
3. party examinations, akin to depositions

Safeguards such as protective orders run alongside these mechanisms to address trade-secret concerns. The regime carries roughly a two-year grace period following promulgation, with implementation expected around 2028, and for now applies only within subcontracting relationships covered by the SME Cooperation Act — a fairly narrow pilot in scope. Similar amendments are already pending for the Patent Act and the Unfair Competition Prevention Act, and this amendment is widely viewed as a template for that follow-on legislation.

Conclusion

The cookware lid case illustrates how the enhanced-damages regime is settling into practice. By reading conditional intent into the concept of willfulness, the court preserved the regime's deterrent bite, while signaling it would not sweep in every case of advertent negligence that happens to result, after the fact, in a finding of infringement following a failed design-around. That is the balance the judiciary appears to be striking between protecting innovation and keeping liability proportionate to culpability.

That balance, though, is not a finished product. U.S. patent law, too, left the substantive content of willfulness undefined in the statute, leaving it to case law — and the operative standard has shifted with the innovation-policy climate of the day. Korea's enhanced-damages regime is unlikely to be any different. The line between protecting innovation and safeguarding a fair opportunity to defend will keep moving, and it will need to keep being recalibrated as the underlying environment changes.

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This article is a general commentary based on published judicial decisions, statutes, and press releases. It does not constitute legal advice on any particular matter.

Does Exporting Equal Patent Infringement? A U.S. vs. Korea Breakdown of New 2025 Laws

 

Blogging_CS | September 21, 2025

Redrawing the Borders of Patent Rights in a Global Era

Have you ever wondered about this? If you make parts in Korea, send them to China for assembly, and then sell the final product in the U.S. market, can you avoid infringing a Korean patent? In the past, that might have been possible. But not anymore. The traditional principle of territoriality—that a patent is only enforceable in the country where it was granted—is constantly evolving to keep up with the global business environment.

This is especially true in an age where it's common to source components from all over the world, assemble them in another country, and sell them in a third. The U.S. and South Korea, in particular, have been grappling with these kinds of patent circumvention strategies. Both countries have developed their laws in different ways to regulate the cross-border act of exporting. Today, we're going to dive deep into the fascinating evolution of their laws.

Part 1: The Evolution of U.S. Law - Legislature Fills a Judicial Gap

Let's start with the U.S. story. It all began with a famous 1972 Supreme Court case, Deepsouth Packing Co. v. Laitram Corp. At the time, the Court ruled that exporting components of a patented invention for assembly abroad was not infringement. Why? Because the Patent Act only prohibited the act of “making” the invention within the U.S. In essence, the ruling was seen as a roadmap for how to get around a U.S. patent. This created one of the most infamous legal loopholes in U.S. patent history: the “Deepsouth Loophole.”

As you can imagine, this caused an uproar. Patent holders were outraged by this disastrous decision, and eventually, Congress had to step in. Twelve years later, in 1984, Congress responded to the Supreme Court's "invitation" by enacting 35 U.S.C. § 271(f), which completely closed the loophole. The genius of this provision was that it shifted the focus of infringement from the overseas “assembly” to the domestic “supply of components.” It was a brilliant solution that respected the territoriality principle while still having an extraterritorial effect.

💡 Good to Know: The Two Blades of U.S. Patent Law § 271(f) This section regulates infringement in two different scenarios, and it's a crucial distinction.

• (f)(1) The Quantity Approach: This applies when you supply “all or a substantial portion” of the components of a patented invention from the U.S. in a way that “actively induces” the combination abroad. Here, substantial portion means the number of components—the quantity.
• (f)(2) The Quality Approach: This applies when you supply even a single component, as long as it's a key component “especially made or adapted” for the invention and not a staple article of commerce, knowing it's for the invention and intending for it to be assembled abroad.

In the end, the U.S. followed a classic path where the judiciary's strict interpretation of the law created a clear loophole, and the legislature stepped in to fix it by defining a new type of infringement. This approach was faithful to the principle of separation of powers while also responding to the needs of the industry.

Part 2: The Evolution of Korean Law - Judicial Evolution, Legislative Completion

So, what about South Korea? Its approach has been quite different from that of the U.S. Instead of creating a new law, Korea chose to gradually expand the scope of its regulations by reinterpreting existing laws. However, as the limitations of relying solely on case law became apparent, the legislature finally stepped in to ensure legal stability.

In the past, Korean courts were hesitant to find patent infringement for the export of components or semi-finished products. However, in cases like the “Suture Anchor Case” (2019Da222782), the Supreme Court began to carve out exceptions, suggesting that even if a product was incomplete, the domestic “production” could be considered direct infringement if it embodied the substantial value of the patent and required only minor processing abroad.

But there was a consensus that these judicial exceptions weren't enough. Finally, the amended Patent Act, effective July 22, 2025, will put this issue to rest.

The Core of the 2025 Patent Act Amendment: Codifying "Export"

The key change in this amendment is the explicit inclusion of “export” in the definition of “working” a patent (Article 2) and as an act of infringement (Article 127). Now, patent holders can directly sue for an injunction or damages based on the act of exporting an infringing product. There are three important goals behind this change:

1. Closing a Legal Gap: It fixes the legislative loophole identified in cases like the Nokia ruling, which failed to prevent infringing products made in Korea from being shipped overseas.
2. Harmonizing the Legal System: It aligns the Patent Act with other IP laws like the Design Protection Act and Trademark Act, which already considered “export” as infringement, and harmonizes it with major countries like Japan and Germany.
3. Strengthening Protections for Rights Holders: Previously, one had to prove the complex act of domestic “production.” Now, infringement can be claimed based on the act of “export” alone, significantly reducing the burden of proof.

Part 3: How the New Law and Case Law Work Together

You might be asking, “So now, is exporting any unfinished product automatically patent infringement?” The short answer is no. The amended law and existing case law (the Suture Anchor Case) don't conflict with each other; they are complementary regulations that apply to different situations.

The fundamental principle of patent infringement is the “all-elements rule,” which means a product must include every element of a patent claim to infringe. The amended law regulates the act of exporting, but it doesn't change what is being exported. Therefore, for the new law to apply, the exported item must already be a “finished product” or a “dedicated component” that constitutes indirect infringement on its own.

This is where the Suture Anchor Case becomes important. This ruling created a legal doctrine for finding direct infringement as an exception for “unfinished products” if they meet four very strict criteria, even if they aren't dedicated components, as long as the quantity is substantial.

An Interesting Parallel in U.S.-Korea Law

It's fascinating to compare the laws of the two countries. It's as if they took different paths but arrived at a similar destination.

• Korea's Patent Act Article 127 (indirect infringement) regulates the production and sale of “dedicated components” used only for infringement. This is functionally similar to how U.S. Patent Law § 271(f)(2) regulates the export of “especially made key components.” (Regulating the quality/nature of key components)
• The Korean Supreme Court's “Suture Anchor Case” allows for direct infringement in exceptional cases where an unfinished product includes “substantially all” of the components. This plays a role corresponding to how U.S. Patent Law § 271(f)(1) regulates the export of “all or a substantial portion” of components. (Regulating the substantial quantity of components)

Part 4: A Comparative Analysis - The Decisive Differences

Faced with the same problem of patent circumvention through exports, the U.S. and Korea came up with very different solutions. The process of how these laws were made—the “path of legal development”—clearly shows the different roles of the judiciary and legislature in each country.

Category	United States (‘Judiciary → Legislature’ Model)	South Korea (‘Judiciary → Judiciary → Legislature’ Model)
Path of Legal Development	After the Supreme Court clearly identified a legal gap in the Deepsouth ruling and called for legislative action, Congress solved the problem by creating § 271(f). This is a classic model of division of labor: the judiciary identifies the problem, and the legislature solves it.	After the Supreme Court established a strict principle in the Nokia case, it created an exception to that principle in the Suture Anchor Case, thus performing a law-making function. The legislature later adopted this direction and codified “export” to complete the legal framework. This is closer to a model of “dynamic interaction.”
Approach to Infringement	Indirect Infringement Model (inducing/contributing to overseas assembly)	Direct Infringement Model (the act of exporting itself)
Key Burden of Proof	Proving the defendant’s subjective intent (inducement, knowledge) is crucial.	Proving the objective fact (infringing product, act of export) is sufficient.

The biggest difference is the “approach to infringement.” The U.S. treats the export of components as “indirect infringement” that contributes to an infringement that will happen overseas, while Korea treats the act of “exporting” itself as a completed “direct infringement.” This fundamentally changes what a patent holder has to prove in court. In the U.S., you have to prove that “the defendant had bad intentions,” but in Korea, you just have to prove the objective fact that “the defendant exported this product.”

Part 5: Strategic Takeaways for Your Business

These complex legal changes present significant challenges for companies operating in the global supply chain. The naive assumption that you only need to worry about patents in your own country is no longer valid.

1. Analyze Patent Risk Across the Entire Supply Chain: From product planning and sourcing components (from Korea, the U.S.) to production, assembly (in a third country), and final sales, you must conduct a comprehensive analysis of patent infringement risks. You need to check if sourcing components from Korea falls under the Suture Anchor Case criteria, or if sourcing from the U.S. falls under § 271(f).
2. Refine International Contracts: When signing contracts with overseas partners for component supply or manufacturing, it's now essential to include clauses that clearly define liability in the event of patent infringement. Be sure to specify the final sales regions and uses of the products to avoid unexpected disputes.
3. Prepare for Jurisdictional and Legal Application Issues: If a U.S. parent company instructs its Korean subsidiary to produce and export an infringing product, you need to anticipate in which country a lawsuit might be filed and under which laws. The jurisdictional issues are becoming much more complex.

⚠️ A Word of Caution!
This content is for general informational purposes to help understand complex legal issues and does not constitute legal advice. For legal judgments or strategic planning on individual cases, you must consult with a qualified patent attorney.

Frequently Asked Questions (FAQ)

Q: What exactly was the "Deepsouth Loophole" in the U.S.?

A: It was a workaround where a company could make all the parts of a patented product in the U.S. and then do the final assembly just outside the country. In 1972, the Supreme Court ruled this wasn't “making” the invention in the U.S., which made it a legal way to avoid patent infringement. Congress finally closed this loophole with a new law in 1984.

Q: Does Korea's "Suture Anchor Case" ruling always apply to the export of unfinished products?

A: No, it only applies in very strict and exceptional cases. Four conditions must be met: ① the part produced in Korea must contain almost all the substantial value of the patent, ② it can be completed with only minor additions/replacements/removals, ③ it's clear the buyer will make it into a finished product, and ④ the situation is substantially identical to producing the finished product in Korea.

Q: With the new Korean law in 2025, will exporting any component now be considered patent infringement?

A: No. The amended law adds the “act of exporting” as infringement, but it doesn't change the definition of an infringing “item.” Therefore, the exported item must either be a “finished product” that includes all elements of the patent or a “dedicated component” with no other practical use. Exporting general-purpose components is still not direct infringement.