You are using an outdated browser and your browsing experience will not be optimal. Please update to the latest version of Microsoft Edge, Google Chrome or Mozilla Firefox. Install Microsoft Edge

June 2, 2011

Ownership of Trade Secrets in Thailand

IP Litigator

Thailand’s desire to increase its competitiveness as an investment destination has led to the passage of the Trade Secret Act 2002 (TSA). The TSA is the most recent law on the protection of industrial property rights in the Kingdom and complies with Article 39 of the Agreement on Trade-Related Aspects of Intellectual Property Rights (TRIPS Agreement). For all its virtues, however, the TSA contains a loophole that may undermine its central goal of preventing unfair competition in Thailand—the TSA does not explicitly vest ownership of a trade secret in a single owner. This loophole is especially problematic where both an employer and an employee claim ownership of a trade secret.

In the course of conducting business, an enterprise may hire a researcher or a team of researchers to create new products or improve existing products. Any trade information, which includes, but is not limited to, formulas, methods, techniques, or processes discovered in the course of research, may be entitled to protection as a trade secret. Akin to other types of intellectual property laws, the TSA grants a negative right to the owner of the trade secret, permitting him or her to exclude others from the act of disclosure, deprivation, or usage of the trade secret. In the event that the right of the trade secret owner is infringed, the owner may bring an infringement action against the alleged infringer in Thailand’s Central Intellectual Property and International Trade Court (IP&IT Court).

In an infringement action, the plaintiff must prove both ownership of the trade secret and that the trade information qualifies as a trade secret. Unlike the Thailand’s Patent Act 1979, the TSA does not require the registration of the trade secret. And, unlike the Copyright Act 1994, the TSA does not include a presumption that the plaintiff is the legitimate owner of the trade secret in dispute. Consequently, the plaintiff is inevitably faced with the prospect of proving his or her ownership of the trade secret.

The TSA identifies the owner of a trade secret by specifying the actions that qualify an entity to claim ownership. To wit, an owner of a trade secret is:

  1. the person who discovers, invents, compiles, or creates the trade information;
  2. the person who has a legitimate interest in the testing result or trade information that is a trade secret; and
  3. the transferee.

If you paused to note the conjunction in this definition, you have read this definition correctly. Ownership in a trade secret can theoretically be vested in multiple entities. For example, an employer would own the trade secret by virtue of having a legitimate interest in the trade information and an employee would also own the trade secret because the employee created the trade information.

Where multiple persons qualifying as owners under provisions (1) and (2) above claim ownership in a trade secret, the TSA appears to be silent on which owner would have superior rights. In this instance, it is appropriate to apply a variation of the canon of construction named in pari materia (upon the same matter or subject), which provides that, in the event of statutory ambiguity, clarification may be derived from reviewing statutes on the same subject matter.

We look first to Thailand’s intellectual property regime. Thailand’s Patent Act 1979 provides that the first right to apply for a patent for an invention made pursuant to an employment or other contract belongs to the employer or the person who commissioned the work, unless otherwise provided in the contract. Thailand’s Copyright Act 1994 provides that the copyright in a work created by an author in the course of employment vests in the author, unless otherwise agreed in writing. The employer, however, is entitled to communicate such work to the public in accordance with the purpose of the employment. Here, the opposing ownership rights may be reconciled by considering the economic realities underlying the creation of the work.

In creating a copyright work, one could say that the employee, who is the author, would have to rely on his or her own creative ideas and effort rather than the information or resources owned by the employer. Therefore, it may be proper to grant the superior ownership right to the employee who created the copyright work as an additional incentive. On the contrary, in creating an invention, the employee would need to significantly rely on the employer to continuously invest in research and development (R&D). Therefore, it is important that the law recognizes the commercial interest of the employer in the invention, by granting the first right to apply for a patent as an incentive to invest in R&D. An argument can be made that a trade secret is more akin to a patent in the nature of the subject matter, as both protections are related to technical or commercial innovation. Further, the employer has a compelling commercial interest in both trade secrets and patented products because both require extensive R&D investment.

Looking further afield for guidance, the European Community has determined that it is preferable to leave the question of ownership of an invention created by an employee open for each nation to answer in accordance with its own laws. The European Patent Convention, therefore, does not specify who has the first right to apply for a patent. The rules relating to the ownership of an invention created by an employee differ greatly among the member states of the European Community. Similarly, copyright laws vary by jurisdiction. The United Kingdom, for example, grants copyright ownership to the employer. This approach is supported by the rationale that the employer is in a better position to derive profit from the copyright work.

While parties (and courts) may look to the intellectual property landscape and the various rationales underlying same to craft their arguments, it is clear that trade secret ownership should not be determined in the context of a dispute or litigation. Instead, employers should enter into a valid written agreement between the employer and the employee to conclusively identify the party who is the only legitimate owner of the trade secret.

Employers can also consider, with able legal counsel, the possibility of taking a transfer of a trade secret.  Section 5 of the TSA provides that “[t]he trade secrets owner is entitled to disclose, deprive of, or use the trade secrets, or license someone else to disclose, deprive of, or use the trade secrets. He may also stipulate any terms and conditions for the maintenance of the secrecy.”

Note, however, that taking rights as transferee may also be fraught with uncertainty. In taking rights as a transferee, the employer must first acknowledge that the employee was the initial owner of the trade secret. While this acknowledgment is necessary to effect a valid transfer of rights (if the employee does not own the trade secret, he or she has nothing to transfer), it will likely undermine any ownership claim subsequently made by the employer. Further, the employer must make certain that the employer is the only recipient of full rights to the trade secret, and that the employee did not and will not transfer his or her rights in the trade secret, or any portion thereof, to any other entity. Finally, as with the agreement establishing first rights in the trade secret, the owner must take care to ensure that the agreement is valid and enforceable.

In sum, until the law is changed to specify who is the first owner of a trade secret, employers’ rights to trade secrets developed by their employees will be open to challenge.  If the ownership of trade secrets is in limbo, businesses may have to confront the problem of protecting industrial property rights or preventing unfair competition in Thailand.

RELATED INSIGHTS​ 

June 15, 2026
The surge in AI development has led to a desperate demand for large, high-quality training data. However, real-world data can be expensive to collect, difficult to access, and often subject to strict privacy and regulatory constraints. Synthetic data, which consists of artificially generated records that replicate the statistical properties of real-world data without reproducing specific individuals’ information, provides an appealing solution by generating artificial datasets at scale without relying on identifiable personal information. It combines speed, cost efficiency, and regulatory compliance, making it a sensible alternative for organizations seeking to reduce risks while maintaining data utility. When properly anonymized, synthetic datasets may fall outside the scope of laws such as the EU’s General Data Protection Regulation (GDPR) or Thailand’s Personal Data Protection Act (PDPA), reducing compliance burdens while still supporting high-quality model training. However, relying on synthetic data without rigorous legal due diligence could be a strategic mistake. It replaces one set of known risks (scraping, direct privacy liability) with a new set of complex liabilities. The narrative that synthetic data is a “silver bullet” for privacy and IP compliance is dangerous and could be misleading. While synthetic data addresses data scarcity, it also introduces new legal uncertainties. Legal counsel should anticipate downstream risks arising from compromised data sources. Models trained on unlawfully obtained data may need to be decommissioned, even if their outputs appear lawful. What is synthetic data? Synthetic data refers to artificially generated information created using AI techniques such as deep learning and generative models. Instead of copying real records, it reproduces the statistical patterns and relationships found in the original dataset. Synthetic data generally falls into three categories: Fully synthetic data – Entirely new data points generated from learned patterns. The model studies the structure of the original data and produces records that resemble real-world
June 10, 2026
In March 2026, the Intellectual Property Office of Vietnam (IP Office) issued a decision refusing a trademark application after considering an opposition based primarily on copyright grounds. The outcome is noteworthy because the foreign brand owner had neither trademark registrations nor applications in Vietnam at the time the opposition was filed, and the IP Office has historically applied a stringent approach to oppositions relying on copyright. The Opposition Maurten is a well-known Swedish sports nutrition brand recognized globally for its innovative hydrogel technology, which is designed to help endurance athletes fuel more effectively without gastrointestinal discomfort. The brand’s distinctive logo is characterized by clean lines and a bold black-and-white color scheme, and has long been associated with the company’s performance products. The brand’s logo is displayed above. An identical mark was filed for registration by a Vietnamese trademark squatter. In 2023, a Vietnamese individual filed an application for registration of an identical mark (Application No. 4-2023-38668), a practice commonly observed in Vietnam as trademark squatting. The brand owner engaged Tilleke & Gibbins to assist with strategy and filing an opposition to the mark. At the time, Maurten had no trademark rights or meaningful use in Vietnam, and global marketing data showed only modest figures without any local presence. Thus, to convince the IP Office to refuse the squatter’s application, instead of relying on trademark rights or use evidence, the opposition strategy centered on the copyright protection of the logo itself, as copyright arises automatically in Vietnam upon creation of the work and does not require registration. (It is worth noting, however, that the IP Office has traditionally been cautious in accepting copyright as a basis for refusing trademark applications.) On September 24, 2024, an opposition was filed on three main grounds: confusing similarity, copyright infringement of the artistic work,
June 10, 2026
For multinational franchisors operating in Thailand, a key risk after franchise termination is that former outlets may continue operating in ways that could easily mislead consumers into believing they remain within the authorized network. To justify such operations, former franchisees often argue that the termination was invalid or ineffective. As a result, these cases are often treated as contractual disputes, making it difficult for franchisors to obtain injunctive relief before a final judgment confirms that the termination was lawful. Franchisors face significant commercial and reputational harm during lengthy proceedings, including consumer confusion, disruption to franchise restructuring, and damage to brand reputation and customer trust. In an encouraging development, the Thai court in a 2025 case responded to the problem of unauthorized post-termination franchise operations by granting interim relief, recognizing broader brand and consumer harm, and awarding substantial damages, highlighting a successful litigation strategy of framing the dispute not merely as a contractual termination issue but as trademark infringement causing ongoing commercial injury. The Subway Case From December 2024 to mid-2025, an unauthorized “Subway®” franchise operation in Thailand attracted substantial public and media attention. Reports and online discussions about unauthorized Subway® stores circulated widely after complaints arose about food quality and customer experience at certain outlets that were allegedly operating after their franchise rights had expired. Because these stores continued to use Subway® trademarks, trade dress, and overall commercial appearance, many consumers were unable to distinguish them from authorized operations, resulting in reputational risks and customer confusion that affected the franchisor’s brand and franchise system in Thailand. Subway treated this matter with the utmost seriousness and moved promptly to protect its brand, franchise system, and customers. It filed a civil action with the IP&IT Court seeking a permanent injunction and damages. During the proceedings, the court granted a preliminary injunction
June 4, 2026
On May 19, 2026, the Cabinet of the Royal Thai Government approved, in principle, revisions to Thailand’s visa exemption scheme and visa on arrival (VOA) program, as proposed by the Ministry of Foreign Affairs and the Ministry of Tourism and Sports. The revisions represent a tightening of Thailand’s immigration framework and will affect a broad range of short-term visitors. Background On July 15, 2024, Thailand expanded its visa exemption scheme by increasing the permitted period of visa-exempt stay from 30 days to 60 days in order to promote tourism, support the country’s post-pandemic economic recovery, and facilitate international travel. Under this revised scheme, passport holders from 93 countries and territories (an increase from the previous 57 countries and territories) have been permitted to enter Thailand without a visa and remain in the country for up to 60 days per entry for purposes including tourism, business engagements, urgent work, and ad hoc assignments. In addition, eligible visitors may apply at the Thai Immigration Bureau for a further 30-day extension of stay. Key Changes The proposed revisions would revoke the current 60-day exemption and reinstate the previous stay period, thereby reducing the maximum permitted stay for eligible travelers to 30 days per entry. In addition, the number of countries and territories eligible under the 30-day visa-exemption scheme is expected to be reduced to 54. The scope of the VOA scheme would likewise be significantly narrowed, with the number of eligible countries reduced from 31 countries to just four (Azerbaijan, Belarus, Serbia, and India). Further, Thailand is expected to introduce a new 15-day visa exemption category for nationals of Seychelles, the Maldives, and Mauritius. The revised framework would also limit each country or territory to a single visa exemption privilege in order to simplify Thailand’s immigration framework and reduce overlapping immigration privileges.