Intellectual Property

Strategy, protection and litigation for patents, trademarks, copyright and trade secrets.

We help enterprises build and protect IP assets. Our team’s backgrounds in biomedicine, electrical engineering and chemistry enable us to handle highly technical matters, and we have filed patent litigation in U.S. courts together with U.S. counsel.

Patent, trademark and copyright filing and strategy
Trade secret protection and confidentiality orders
Infringement litigation and IP Court remedies
Licensing, technology transfer and contracts

Featured Lawyers & Advisors

Chun-Hung Yeh

Director of Louis & Charles Taipei

Taipei・Hsinchu・Taichung・Ho Chi Minh City

Yi-Yun Hung

Senior Legal Specialist / Manager of IP Department

Taipei・Hsinchu・Taichung

Chao-Cheng Chen

Patent Attorney

Taipei

Kuan-Lang Huang

Patent Attorney

Taichung

Related Insights

November 6, 2026

Thailand Patent Guide 2026: Invention Patents, Petty Patents and Designs for US and Foreign Companies, PCT Entry, Fast-Track Options and the Draft Patent Act

How a US or other foreign company protects technology and product design in Thailand in 2026: the three rights under the Patent Act (20-year invention patents, petty patents of up to 10 years with no substantive examination, 10-year design patents), entering Thailand through the PCT at 30 months or under the Paris Convention, why a US grace-period disclosure can destroy Thai novelty, the Japan-only PPH and other fast-track routes, what cannot be patented, the employee's non-waivable right to remuneration, criminal and civil enforcement, and what the draft Patent Act would change in fees, deadlines and design term.

Po-Chang Yu (Raymond Yu) · Chief Lawyer / Founder and CEO of Louis Group

November 5, 2026

Trademark Registration in Thailand 2026 for US and Foreign Brands: Fast Track 4 Month Plus+, Madrid vs Direct Filing, and the First-to-File Rule

How a US or other foreign brand registers a trademark in Thailand in 2026: the Fast Track 4 Month Plus+ route for e-commerce sellers in force since 1 January 2026 and its conditions (one class, ten items, electronic filing, no amendments), why it is closed to Madrid Protocol designations, how to choose between Madrid and a direct Thai filing, what first-to-file means for a brand built on use in the United States, six-month priority from a USPTO application, and the three-year non-use and ten-year renewal rules.

Dr. Yvonne Wei (Arisa Pailinsiri) · Senior Partner of Louis & Partners Thailand