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Sirikul Ngawiset

Associate & Patent Agent

Biography

Sirikul Ngawiset is an associate and patent agent in Tilleke & Gibbins’ intellectual property group in Bangkok. With a strong focus on patent law and special expertise in the dynamic field of biotechnology, she helps companies in a wide spectrum of industries achieve patent protection for their complex technologies and innovations. In addition to ensuring robust intellectual property protection for her clients’ intellectual assets, Sirikul takes action that empowers her clients to secure and commercialize their new inventions.

Sirikul’s core services include filing patent applications and conducting patent searches, patentability assessments, and patent landscape and patent infringement analyses. With a keen eye for detail, Sirikul is a go-to expert for preparing, drafting, and reviewing patent specifications to ensure complete accuracy and compliance with legal standards.

Prior to joining Tilleke & Gibbins, Sirikul was a patent agent at a Thai government agency for research in science and technology, a patent prosecution associate at another prominent law firm in Bangkok, and an intellectual property analyst at the research and development arm of a major Thai conglomerate.

Sirikul holds an MSc in Biochemistry and Molecular Biology and a BSc in Biochemistry from Chulalongkorn University, as well as an LLB from Sukhothai Thammathirat Open University. She is a patent agent licensed by Thailand’s Department of Intellectual Property, and has completed the Patents course from WIPO Academy and the South East Asian Drafting Course from the FICPI Academy of Education.

Experience

  • Drafted patent specifications to secure robust intellectual property protection for various companies in the ever-evolving field of biotechnology—including in fields such as genetic engineering, agriculture, food science, medicine, and pharmaceuticals.
  • Analyzed and evaluated the patentability and market potential of a diverse array of innovations, spanning multiple fields, on behalf of numerous technology companies.
  • Conducted comprehensive patent analyses, including patent landscape assessments and freedom-to-operate (FTO) analyses, tailored to the specific needs of a client in the dynamic life sciences sector.
  • Provided strategic intellectual property counsel to companies by conducting thorough assessments of their patent specifications and related agreements, facilitating optimal protection and commercialization of their innovations.
  • Managed patent portfolios for various companies, which entailed overseeing the entire lifecycle of patent applications from initial application drafting and prosecution to the ultimate grant of patents.
ABOUT Sirikul

Location

Languages

    Thai

    English

Education

    MSc, Chulalongkorn University

    LLB, Sukhothai Thammathirat Open University

    BSc, Faculty of Science, Chulalongkorn University

Insights

December 9, 2025
Tilleke & Gibbins is proud to announce that four litigation cases handled by the firm have been selected among the nine Distinguished Judgment Awards granted by Thailand’s Central Intellectual Property and International Trade Court (IP&IT Court) for the period from October 1, 2024, to August 31, 2025. This recognition highlights the complexity, novelty, and legal significance of these cases, which were chosen based on stringent criteria including new legal issues, high evidentiary volume, and intricate legal arguments. Among these four cases, one was singled out as the “Most Distinguished Judgment” – the landmark trademark squatting case involving the trademark rights of our client, Thailand’s largest state-owned energy conglomerate, and its subsidiary. In this case, the defendants had filed 52 trademark applications mimicking our client’s marks, making it the largest trademark squatting dispute in Thai history. On April 30, 2025, the IP&IT Court ordered the cancellation of multiple infringing trademarks, setting a benchmark for IP enforcement against trademark squatters in Thailand. The other three recognized cases demonstrate Tilleke & Gibbins’ breadth of expertise in IP litigation: Patent infringement and invalidation involving trade secrets misappropriation. Trade dress infringement of a unique packaging. Landmark Luckin Coffee case involving trademark infringement and invalidation. The IP&IT Court handles approximately 200 IP civil litigation cases each year, and our IP litigation team has typically been involved in 25–30% of them, reflecting our dominant role in shaping IP jurisprudence in Thailand.
May 2, 2025
Attorneys from Tilleke & Gibbins have updated the latest edition of Doing Business in Thailand, a Q&A-style guide from Thomson Reuters Practical Law that offers an overview of key legal considerations for companies operating in jurisdictions worldwide. The contribution outlines the country’s legal and regulatory framework for foreign investment and business operations and reflects the latest legislative developments. The chapter addresses the following core topics: Legal system: Structure of the courts and the codified nature of Thai law. Foreign investment: Business restrictions under the Foreign Business Act, sector-specific regulations, exchange control rules, and investment incentives. Business vehicles: Overview of partnerships, private and public limited companies, and other legal entities. Employment: Labor protections, employment contracts, foreign worker requirements, and termination procedures. Tax: Corporate and personal income tax, indirect taxes, and tax obligations for residents and non-residents. Intellectual property: Registration and enforcement of patents, trademarks, designs, and copyrights. Data protection: Key provisions of the Personal Data Protection Act and related compliance obligations. Competition law: Regulatory framework under the Trade Competition Act. Anti-bribery and corruption: Relevant legislation and enforcement mechanisms. E-commerce and digital business: Legal regime for online transactions and digital platforms. Marketing and advertising: Consumer protection laws and regulations affecting advertising and marketing practices. Product regulation and liability: Safety standards, liability regimes, and roles of enforcement authorities. Practical Law, a legal reference resource from Thomson Reuters, publishes a range of guides for hundreds of jurisdictions and practice areas. The insurance and reinsurance guide is a valuable resource for legal practitioners, covering numerous jurisdictions worldwide. To view the latest version of the guide, please visit the Practical Law website and enroll in the free Practical Law trial to gain full access.
March 17, 2025
Tilleke & Gibbins has contributed the Cambodia, Myanmar, Thailand, and Vietnam chapters to Data Protection and Cybersecurity Regulation in Southeast Asia, a wide-ranging guide published by Drew Network Asia (DNA). The resource provides a comprehensive overview of data protection and cybersecurity laws across the region, offering practical insight into compliance requirements and regulatory developments affecting organizations that handle personal data or operate digital services in Southeast Asia. The guide begins with a regional overview, including the broader ASEAN context and cooperation initiatives. Jurisdiction-specific chapters follow a consistent structure—covering data privacy and governance obligations, security requirements and breach notification, outsourcing and cross-border data transfers, and broader accountability and compliance measures. This format allows readers to compare regulatory approaches across markets such as Brunei, Indonesia, Malaysia, the Philippines, Singapore, and others. In addition to the country chapters, the publication addresses cybersecurity and privacy engineering challenges, providing guidance for organizations and outlining obligations applicable to data controllers, processors, and intermediaries. A dedicated section on data breach management across ASEAN examines notification requirements, response considerations, and practical steps for managing incidents in a regional or global context. The guide is intended to serve as a practical reference, and the authors note that specific legal requirements may vary depending on sector, processing activity, or evolving legislation. Readers seeking more detailed advice can contact the practitioners listed in each chapter. The full guide is available for download using the button below or directly from the DNA website.

Awards & Rankings

May 14, 2026
Asian Legal Business (ALB) has published the ALB Asia IP Rankings 2026, the latest edition of its annual guide recognizing leading intellectual property firms across the region. Continuing the approach introduced last year, the rankings present a unified table in each jurisdiction, combining patent and trademark/copyright work to provide a more holistic view of the IP market. Tilleke & Gibbins has retained strong rankings in all three jurisdictions covered by the survey: Thailand: Tier 1 Vietnam: Tier 1 Indonesia: Tier 2 The rankings are based on work conducted between February 2025 and February 2026, covering both ongoing and completed contentious and noncontentious matters. ALB’s research draws on firm submissions, client feedback, editorial resources, and market input to identify the region’s leading IP practices. Tilleke & Gibbins’ IP team has maintained a strong track record across all ranked jurisdictions since the inception of the ALB IP Rankings in 2018. To view the full rankings, please see the May 2026 issue of ALB.
April 3, 2026
Tilleke & Gibbins is pleased to announce that the firm has been shortlisted in two categories at the Financial Times (FT) Innovative Lawyers APAC 2026 awards: Innovative Lawyers in Cyber and Data Privacy – “Digital Identity & Cryptocurrency Compliance” Innovative Practitioner – Athistha (Nop) Chitranukroh The FT Innovative Lawyers APAC Awards recognize law firms and practitioners who are driving innovation in legal services and delivering innovative client solutions across the Asia-Pacific region. This recognition marks our third acknowledgment in the Innovative Lawyers category and, notably, our first-ever nomination in the Innovative Practitioner category at the FT Innovative Lawyers APAC awards. It reflects our team’s continued ability to support clients on groundbreaking, forward-looking projects across the region. The awards ceremony will take place on May 14, 2026, in Hong Kong. To learn more about the FT Innovative Lawyers APAC 2026 awards and to view the full list of shortlisted organizations, please visit the FT website.
March 19, 2026
Tilleke & Gibbins has been recognized in 17 categories at the 2026 Thailand Law Firm Awards from Asia Business Law Journal (ABLJ), up from 10 categories in 2025. The awards highlight leading law firms in Thailand across a broad range of practice areas, as well as overall firm performance. This year, Tilleke & Gibbins was named a co-winner in the Best Overall Law Firm category as well as in the following practice-specific categories: Artificial Intelligence Aviation Blockchain & Digital Assets Competition & Antitrust Data Compliance & Cyber Security E-Commerce, Digital Trade & Platform Regulation ESG (Environmental, Social, and Governance) Fintech Healthcare & Life Sciences Insurance & Reinsurance IP Litigation IP Prosecution Labour & Employment Private Equity & Venture Capital Shipping & Maritime Technology, Media & Telecommunications The awards are determined through ABLJ’s independent research, which considers recent work, client feedback, and market standing. The annual Thailand Law Firm Awards recognize firms demonstrating strong performance and breadth of expertise across key practice areas. For more details and the full list of winners, please visit the ABLJ website.

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