Tsai Lee & Chen Patent Attorneys & Attorneys at Law

Tsai, Lee & Chen Patent Attorneys & Attorneys at Law is a top-tier IP law firm based in Taipei, Taiwan, and employing over 180 full-service IP professionals and lawyers.

History and specialisations

Founded in 1995, Tsai, Lee & Chen boomed with the advent of Taiwan’s high-tech industrialisation. The firm has since developed a full-service IP law department that encompasses all areas of intellectual property, from prosecution to litigation, and is deeply trusted by its reputable domestic and international clientele.

The firm’s patent expertise, led by nearly 40 patent attorneys licensed in Taiwan and another 45 patent attorneys licensed in China, covers the fields of semiconductors, consumer electronics, thin film transistor liquid crystal display technology, mechanical and electrical engineering, artificial intelligence, financial technology, computer hardware and software, telecommunications, biochemistry, pharmaceuticals, business methods and information technology. Its patent advisory service is renowned for being reliable, comprehensive and ethical.

The firm’s trademark team, along with its attorneys at law, is known for its high level of attentiveness and responsiveness towards each of its clients and cases. In addition to specialising in Taiwanese trademark practice to serve its international clients, the firm’s seasoned professionals manage global trademark protection for domestic clients as well. The lawyers at Tsai, Lee & Chen have gained a reputation for efficiency, reliability and comprehensive legal opinions, as well as their strategic advice on dispute resolution and litigation. The firm also enjoys an outstanding success rate in overcoming citations, oppositions, invalidations and infringement litigations.

International experience

The firm stays up to date with the most recent IP law developments and challenges by actively participating in international IP groups, including INTA, the American Intellectual Property Law Association, the International Association for the Protection of Intellectual Property, the Japan Intellectual Property Association, the International Federation of Intellectual Property Attorneys, the Pharmaceutical Trademarks Group, the European Communities Trademark Association, the Intellectual Property Owners Association, the Licensing Executives Society and MARQUES.

The firm has also accumulated valuable experience and networks in China with more than 20 years’ dedication.

Professional diversity

The firm’s leading practitioners have diverse professional backgrounds. Some possess more than one practice admission before the IP offices in Taiwan, China and the United States. The firm’s domestic and foreign lawyers are familiar with cross-border legal practices and are licensed to practise in Taiwan, China and New York State.


  • Listed as Asialaw Leading Lawyers by Asialaw Profiles in 2021
  • Listed as a Top Tier Firm – Asia Pacific by Legal 500 in 2020
  • Listed as a Leading Firm – Asia Pacific by Chambers and Partners in 2020
  • Listed as a Recommended Firm by IAM Patent 1000 in 2020
  • Listed as a Recommended Firm by WTR 1000 in 2020
  • Listed as Top Tier Firm and IP STARS by MIP Magazine in 2020
  • Listed as an Outstanding Firm by Asialaw Profiles in 2020
  • Listed as a National Expert by Getting the Deal Through – Trademarks in 2020
  • Listed as a Tier 1 Firm – Patent Prosecution and Patent Contentious in Taiwan

by Asia IP Survey in 2020

  • Listed as a Tier 2 Firm – Trademark Prosecution and Trademark Contentious in Taiwan by Asia IP Survey in 2020
  • Recognised as Trademark Firm of the Year for Taiwan by 2019 Asia IP Awards 
  • Listed as a Tier 2 Firm by Benchmark Litigation Asia-Pacific in 2019
  • Listed as a Recommended firm by Global Law Experts in 2019
  • Listed as a Trademark winner by Client Choice – Intellectual Property in 2015 and 2017

Working languages

Chinese, English, Japanese, German and Korean

Contact details

Tsai Lee & Chen Patent Attorneys & Attorneys at Law
11th Floor
148 Songjiang Road
Taipei 104492

Professional contacts

Other offices

  • Taichung
  • Tainan