Tsai Lee & Chen


11th Floor
148 Songjiang Road
Taipei Taipei 104


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Tsai Lee & Chen is a top-tier IP law firm with a 20-year history. Headquartered in Taipei, the firm employs more than 160 IP professionals and lawyers representing clients from all over the world. Our practice covers all aspects of intellectual property, including patent and trademark preparation, prosecution, portfolio management, licensing and IP litigation. The professionals at Tsai Lee & Chen provide reliable and comprehensive legal and patent services in the Greater China region, all while adhering to a strict code of professional ethics.

Firm history
Founded in 1995 by Thomas Q T Tsai, Tsai Lee & Chen grew with a group of patent professionals specialized in various cutting-edge areas of technology. In the past 20 years, the firm developed at pace and quickly emerged among the giants. Now the current managing partner, Victor S.C. Lee, leads the firm alongside with other partners to continuously represent a wide range of clients in full-scope of IP protection.

Areas of specialization
The firm’s patent expertise encompasses the fields of semiconductors, consumer electronics, thin-film-transistor liquid-crystal display technology, light-emitting diode technology, computer hardware and software, telecommunications, biochemistry, pharmaceuticals, mechanical and electrical engineering, business methods and information technology.

The trademark professionals are known by their detail-oriented and attentive working style. Creative thinking makes our trademark group excel, especially in overcoming office actions and handling oppositions and invalidations. 

The firm also has a group of elite lawyers who constantly made landmark cases at the TIPO or the IP Court. Their expertise includes patent, trademark, copyright and unfair competition. 

International experience
Tsai Lee & Chen enjoys more than 1,300 networks with global IP law firms and associates, and has accumulated valuable experiences and networks in China ever since the firm was founded. The firm stays up to date with the most recent IP law developments and challenges by actively participating in international IP groups, including the American Intellectual Property Law Association, the International Association for the Protection of Intellectual Property, the Asian Patent Attorneys Association, the Japan IP Association, the International Trademark Association, the International Federation of Intellectual Property Attorneys, the Pharmaceutical Trademarks Group, the European Communities Trademark Association, the Licensing Executives Society, the Intellectual Property Owners Association and MARQUES. Such a global vision enables the firm to advise companies with cogency and convincing points, so as to save time and costs to the clients. 

The firm assists both domestic and international corporations in diverse industries, as well as universities and research institutions.

Professional diversity
The firm’s talented leading professionals possess diverse technical and legal backgrounds, including qualified lawyers, patent attorneys and patent agents in Taiwan, China and the United States. Integrating the efforts of an elite team, Tsai Lee & Chen can provide cost-effective patent preparation with quality work products for both Taiwan and China, and has demonstrated sophistication in both offensive and defensive IP strategies in resolving IP disputes. The firm has successfully helped many Fortune 500 companies, as well as many small and medium-sized enterprises, to bridge the gap of patent protection between their home jurisdiction and the Greater China region.

Efficiency and Quality
Supported by an inhouse-customized software system, the firm is able to accommodate various demands from clients with little effort. The automation system has helped to put the electronic filing into daily practices, generates e-billing codes per clients’ preferences, and reduces the chances of human errors. The smooth automation management has significantly enhanced working efficiency and quality reliability. 

In recognition of the firm’s excellence, Tsai Lee & Chen has been selected as the Chambers Asia Pacific Leading Firm by Chambers & Partner, the Leading Firm - Asia Pacific by Legal 500, the Recommended Firm by Intellectual Asset Management (IAM), etc. With a personal focus, the firm’s partners Victor S.C. Lee, Candy K.Y. Chen, and Crystal Chen have been honored by various individual titles including the IP Star by MIP, one of Top 250 Women in IP by MIP, a Notable Practitioner of Chambers Asia-Pacific, one of the WIPR Leaders, etc.

Working languages
The firm mainly works in Chinese. English, German and Japanese are also within the language capabilities of Tsai Lee & Chen.