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Domnern Somgiat & Boonma

Thailand

2026_IP Stars Top Tier Firm.png
2026_IP Stars Ranked 10+ Years.png
Key contacts
Partner: Rutorn Nopakun
Partner: Apiwatt Kongsoowan
Partner: Nathapong Tongkaew
Quick facts
Firm - Year of Establishment

1947

Number of Partners

5

Total Number of IP Practitioners

33

Languages Spoken at the Firm

English, Thai

Network Memberships

AIPPI, APAA, ASEAN IPA, ECTA, FICPI, INTA, IPAT, LESI, PTMG

Key practice areas
Intellectual property
Trade mark
Patent
Firm overview

Domnern Somgiat & Boonma (DS&B) is a respected law firm specializing in intellectual property (IP) law that provides clients with both prosecution and enforcement services. The firm has an unmatched team of over 130 members, each with exceptional expertise in their respective fields, from award-winning lawyers holding leadership roles in local and international legal associations, to patent agents, litigators, scientists, and engineers. Client matters are analyzed from all relevant perspectives, and challenges are overcome at every stage of the IP process. Diverse industry expertise includes: fashion and luxury goods, Food & Beverage, computer software, technology and online platforms, financial services, automotive, electronics, construction, real estate, pharmaceuticals, and hospitality.

Founded in 1947, DS&B has more than 70 years' experience in delivering innovative services for IP protection. This is particularly important for the evolving digital environment - in Thailand and globally.

Trademark, Patent, Copyright Practices

Our Trademark team provides clients with advisory, clearance, search, filing, prosecution and renewal services. These specialists represent approximately one-third of the world's top brands, and manage opposition, cancellation, pre-litigation and litigation cases, with responsibility for maintaining trademark registrations after application approval. For Patents, our unique team includes attorneys, scientists and engineers. Attention to detail prior to submission is of primary importance, with team members understanding that success depends on detailed analysis of the how and why of word choices. DS&B is Thailand's leading firm for patent applications filed by foreign parties. Currently in Thailand, copyright protection occurs automatically as work is created, so DS&B advises on how owners manage diverse aspects of their work and commercialization.

Litigation

The firm's Litigation team is well-known for pioneering precedent-setting lawsuits. Services include: negotiations, mediations, lawsuits and arbitrations. These specialists are experienced in handling complex matters, particularly administrative contracts, multi-faceted financial transactions, consumer protection issues, and computer crimes.

Enforcement

Effective enforcement actions are critical for IP protection, and DS&B arranges police raids against manufacturers, distributors and retailers of counterfeit goods, as well as managing criminal and / or civil court cases. Successful actions are supported by strong relationships with Thailand's Economic Crime Division (ECD), and the Department of Special Investigation (DSI). Customs seizures are another area of enforcement expertise.

DS&B has three guiding principles: Service Quality, Customer Care / Insightful Relationship Management, and Continuing Recognition for IP Expertise. Recent recognition includes: Band 1 IP Firm-Thailand, by Chambers & Partners Asia-Pacific 2023; Tier I Patents, Trademarks, Copyright Firm-Thailand, by Asia IP 2022; Outstanding IP Firm-Thailand, by asialaw 2022; Gold Ranked IP Firm-Thailand, by WTR 1000 2022; Trademark Contentious / Prosecution, by IP STARS 2021, and Thailand Copyright Law Firm of the Year, by Global Law Experts 2021.

DS&B's legal team is recognized for thinking outside the box - and for developing innovative, precedent-setting, and practical solutions. Every lawyer maintains high, international standards for expertise and reliability, in support of the firm's motto: Trusted Partner. True Protection. And, for all team members - there is an understanding that in the legal profession, nothing is more valuable than trustworthiness.

Practice Areas & Sector Specialisations

Key IP Areas

Copyright and Related Rights, Designs, Intellectual Property (contentious), Intellectual Property (prosecution), Life Sciences IP, Patent (contentious), Patent (prosecution), Trademark (contentious), Trademark (prosecution)

Key Sector Expertise

Aerospace, Artificial Intelligence, Automotive, Biotechnology, Chemical, Computer Technology & Services, Construction & Materials, E-commerce, Electronics, Fashion & Luxury Goods, Financial Services, Food & Beverage, ICT & Software, Internet, Life Sciences, Manufacturing, Media, Not-for Profit, Optics & Photonics, Pharmaceutical, Real Estate, Retail, Semiconductors, Sports, Technology Hardware, Telecommunications, Utilities

Address:
719 Si Phraya Road, Bangrak
Bangkok 10500
Tel:+66 2 639 1955 Fax:+66 2 639 1956 Email:Contact Us Web Address:http://www.dsb.co.th
2026 Edition
Patent
Tier 1
13 firms ranked
View full list

Tier 1

Baker McKenzie
6 practice areas
View full profile
Domnern Somgiat & Boonma
3 practice areas
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Tilleke & Gibbins
7 practice areas
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Tier 2

Rouse
3 practice areas
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Satyapon & Partners
3 practice areas
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Tier 3

Ananda Intellectual Property
3 practice areas
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ILCT
4 practice areas
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LawPlus
4 practice areas
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SCL Nishimura & Asahi
8 practice areas
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ZICO IP
7 practice areas
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Other Notable Firms

Lexpertise Law Firm
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TMP Intellectual Property
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Trade mark
Tier 1
15 firms ranked
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Tier 1

Baker McKenzie
6 practice areas
View full profile
Domnern Somgiat & Boonma
3 practice areas
View full profile
Tilleke & Gibbins
7 practice areas
View profile

Tier 2

Ananda Intellectual Property
3 practice areas
View full profile
Rouse
3 practice areas
View full profile
Satyapon & Partners
3 practice areas
View full profile

Tier 3

ILCT
4 practice areas
View profile
LawPlus
4 practice areas
View profile
SCL Nishimura & Asahi
8 practice areas
View profile
TMP Intellectual Property
4 practice areas
View profile

Other Notable Firms

ILAWASIA
8 practice areas
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JTJB International Lawyers
8 practice areas
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Lexpertise Law Firm
5 practice areas
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S&O
2 practice areas
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ZICO IP
7 practice areas
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Overview

Domnern Somgiat & Boonma (DS&B) is a leading IP law firm with experts including award-winning lawyers, patent agents, litigators, scientists, and engineers. It offers comprehensive IP prosecution and enforcement services across diverse industries such as fashion, technology, and pharmaceuticals. The team excels in trademark advisory and prosecution, patent applications, and IP litigation and enforcement 

Notable soft IP practitioners: Apiwatt KongsoowanNathapong Tongkaew 

Testimonials

2026

"Working with this trade mark firm has been consistently impressive; their mastery of the law and their practical, solutions-oriented approach make them a trusted adviser."

"They are diligent, insightful, and unfailingly reliable, delivering high-quality work that adds real value."

"This firm brings a rare blend of technical trade mark expertise and practical commercial judgment. Their clear communication and meticulous work make them an exceptional associate firm. I consistently rely on this team for their sharp analysis and dependable guidance. Their commitment to quality and client care is evident in every matter they handle."

"The team is highly responsive, fast, strategic and very effective in helping us achieve our desired objectives."

"This firm offers a rare blend of professionalism, efficiency, and genuine expertise in trade mark law. The team communicates clearly, responds quickly, and provides advice clients can act on immediately."

"Their trade mark specialists are known for their meticulous work and thoughtful, commercially relevant insights. The team’s responsiveness and steady guidance make them a trusted partner for brand owners."

"The firm’s IP team is exceptionally well‑organised and consistently delivers high‑quality legal work. Their lawyers are proactive, responsive, and skilled at navigating both routine and complex matters."

"Top-tier firm with ability to efficiently handle and resolve all IP-related matters."

"Deep knowledge of law and practice combined with a can-do approach."

Apiwatt Kongsoowan

"Apiwatt provides top-tier trade mark advice delivered with professionalism and precision. His deep knowledge and steady counsel makes him a standout in the field."

"Clients value Apiwatt as a practitioner for his deep understanding of trademark strategy and its unwavering professionalism. He also has excellent client connections and is very friendly and amiable. He is always quick to respond, easy to collaborate with, and consistently delivers strong outcomes."

"Top-notch professional, possessing deep knowledge of law and practice as well as business acumen."

 

2025

"All of the partners and attorneys there are very diligent and knowledgeable. They are a highly trusted overseas associate firm."

"Domnern Somgiat & Boonma's advice is clear, and their trade mark team is generally helpful and prompt."

"Domnern Somgiat & Boonma has a very helpful and friendly IP team."

"High expertise, responsive, reasonably priced, work on a reciprocal basis."

"Responsive and unambiguous advice."

"Responsive, knowledgeable, friendly people."

"Sincere and meticulous."

"The team provides good advice and is very competent in handling matters, is responsive, and works hard to satisfy all aspects of the client's wants (objectives, nuances, timelines, budgets)."

"They always provide polite responses and accurately answer the questions we want to know."

"They always respond quickly, accurately, and their advice is practical."

"They have excellent English and understand commercial realities. They take real care in their advice for our client and in the work they send us for their own clients. "

Linked Reviews
Trade mark

Case studies show opposition and non-use cancellation action work for various clients. 

Partner Rutorn Nopakun retired in 2024 but continues to contribute to the firm's success in his new role as of Counsel. 

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