Domnern Somgiat & Boonma


719 Si Phraya Road, Bangrak
Bangkok 10500

Tel:+66 2 639 1955
Fax:+66 2 639 1956

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Key contacts:

Partner: Rutorn Nopakun
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Partner: Apiwatt Kongsoowan
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Partner: Nathapong Tongkaew
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Quick facts:

Firm - Year of Establishment: 1947
Number of Partners: 5
Total Number of IP Practitioners: 33
Languages Spoken at the Firm: English, Thai

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.


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.


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.

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