Taiwan Lawyers and Law Firms

Deep & Far Attorneys-at-Law
Yu-Li Tsai, Partner and Patent Attorney
13th Fl., No. 27, Sec. 3, Chung San N. Rd. Taipei 104, Taiwan, R.O.C.

Deep & Far attorneys-at-law was founded in 1992 and is dealing with all phases of laws with a focus on the practice in separate or in combination of all aspects of intellectual property rights (IPRs) including patents, trademarks, copyrights, trade secrets, unfair competition, and/or licensing, counselling, litigation and/or transaction thereof.

Deep & Far prosecutes worldwide patent matters for local clients.  For international or foreign clients, Deep & Far prosecutes patent matters mainly in Taiwan, significantly in China & Hong Kong, and with minor representation in Macau, Singapore, Korea & Japan.  Deep & Far prosecutes in every field, such as mechanics, chemistry, pharmacy, biology, electronics, optics, telecommunications, and computer sciences.

The patent attorneys and patent engineers in Deep & Far normally hold outstanding and advanced degrees and are generally graduated from the top three universities in this country.  Our prominent staffs are dedicated to provide the best quality service in IPRs in this country.  As a proof, about one half of top 100 incorporations in this country have experiences of seeking patented their techniques, but more than one fifth of the top 100 incorporations has ever used services of this firm.  Furthermore, Hi-Tech companies in the science-based industrial park located at Hsin Chu had ever played the most important role in booming the economy of this country.  About one half of them has experiences in seeking patented their techniques, and out of more than 50% of the patent-experienced companies in that park have ever entrusted their IPR works to this firm.  Certainly, we must also represent international giants, e.g. InterDigital, MPS, Schott Glas, Toyo Ink, Motorola, Cypress, Armani, CICC, Sun Pharma, Intercept, Torrent, Lupin, Piramal…

We are confident in and proud of our competence, and welcome to be challenged to so prove or show by, e.g. 1) sending us a pending or granted patent for our comments about how we can improve the claims, 2) sending us a pending patent specification without the claims for us to draft the claims for the client’s comparison with the original claims, or 3) sending to the firm the client is currently using and this firm at the same time an initial disclosure so that the client can compare and find out which firm can provide the better claims.

We are not just reporting but analyzing an OA. We are not just receiving instructions but proposing how to react. We are not just transferring official opinions but pointing out how and why the official opinions may be wrong and correctible. We are not just following official requirements but suggesting how they can be overcome without sacrificing the protecting scope. We always force the IPO to change their practices directly upon making a response. We either indirectly force IPO through making a precedent in the IP court reversing the IPO’s incorrect or improper practices.

It is our philosophy to provide competent legal services that other firm cannot comparably provide.  The necessitated ensuing problem is how we can so provide?  Deep & Far so achieve by selecting, edifying and nurturing peoples who have the following personalities: learned in expertise, morally earnest and sincerely behaved in mind and strictly disciplined between give and take.  It is well-believed that such properties are key factors for peoples to properly and competently behave themselves.

By the perseverance that we only do what and only perform works which enable this firm to be deep and far, Deep and Far can then equate the reality with its name.

More information regarding this firm could be found from the website above-identified.

Awards and Recognitions

International Advisory Experts Awards 2019, International Advisory Experts;
Intellectual Property Law Firm of the Year in Taiwan, Global Awards 2019, Corporate INTL;
Leading Lawyers 2019, Asialaw;
Innovation & Excellence Awards 2019, Corporate LiveWire;
IP Law Firm of the Year, Law Awards 2018, Corporate USA Today;
Global 100 2018, Global Venture Awards;
IP STARS 2018, Managing IP;
Asia’s Leading Patent Firms 2018, Asia IP;
The Legal 500 Asia Pacific 2018, The Legal;
Leading Lawyers 2018, Asialaw;
Patent 1000 The World’s Leading Patent Practitioners 2018, iam;
Lawyer International Legal 100 2018;
IP Experts in Chamber and Partners 2018;
Global Law Experts Annual Awards 2018, Global Law Experts;
Corporate Intl Global Awards 2018;
IP Law Firm Of The Year, Global Awards 2018, Corporate LiveWire
Global Leading Lawyers 2018, Lawyers, Worlwide Awards Magazine;
Corporate USA Today Annual Awards 2018, Corporate USA Today;
Business Excellence awards 2018;
Lawyer Monthly 2018;
International Advisory Experts Awards 2018;
IP Expert in Advisory Excellence 2018;
IP Expert in ALB Who’s Who 2018, ALB Who’s Who;
M&A Today Global Awards 2018, M&A Today;
IP Expert in Leaders-in-Law 2018, Global Lawyer Directory;
IP Expert in Professional Sector Network of Global Awards 2018, Professional Sector Network.

Description of key persons

(1) Mr. C.F. Tsai earned bachelor of Marine Engineering from NCTU, LLB from NTU, and LLM from Soo Chou University.  He is the sole patent attorney in Taiwan who passed both bars in the technological and law fields.  He extensively involves the full phase of IP laws.  Under his leadership, this firm is very confident to provide the best IP services in Taiwan.  Specifically, we are willing to take challenges to show our extraordinary competence by the following exemplary ways, e.g. the client 1) sends us a pending or granted patent for our comments about how we can improve the claims, 2) sends us a pending patent specification without the claims for us to draft the claims for the client’s comparison with the original claims, or 3) sends to the firm the client is currently using and this firm at the same time an initial disclosure so that the client can compare and find out which firm can provide the better claims.

(2) Mr. Yu-Li Tsai received a Bachelor degree from the Department of Electrical Engineering of the National Taiwan University (NTU) and a Master degree from the Graduate Institute of Communication Engineering of NTU.  He also received an IP Master degree from UNH Law and the Franklin Pierce Center for Intellectual Property. Right after the graduation, he had an opportunity to work for InterDigital, Inc. in Delaware for a short period.  He is concurrently majoring a law master in National Chiao Tong University.  Mr. Tsai received the qualification of Taiwan Patent Attorney and China Patent Agent.  He also passed US and Examination.

(3) Mr. Lu-Fa Tsai, an attorney-at-law graduated from the Department of Law of National Taiwan University (NTU), which is the best law school in Taiwan. Out of the interest in business law, he attended the Graduate Institute of Law of NTU after he had obtained the LL.B. degree and received his LL.M. degree after 3 years. One year before he graduated from the graduate institute, he passed the bar examination. Mr. Tsai has also gained an LL.M. degree from the Faculty of Law of the University of Göttingen in Germany. The field of study of this degree is international economic law. After he came back from Germany, he joined the Deep & Far Attorneys-at-Law. He is working as a partner lawyer at the firm currently.


Tsai, Yu-Li (2018). The Patent Litigation Law Review – Edition 2, The Law Reviews


Tsai, Yu-Li; Tsai, Lu-Fa (2018). The Trademarks Law Review – Edition 2, The Law Reviews


Tsai, Yu-Li; Tsai, Lu-Fa (2018). Copyright 2019, The International Comparative Legal Guide, https://iclg.com/practice-areas/copyright-laws-and-regulations;
Tsai, Yu-Li (2018). Patent Litigation 2018, Chamber and Partners,


Tsai, Yu-Li (2018). The Patent Litigation Law Review – Edition 1, The Law Reviews


Tsai, Lu-Fa (2018). Trade Marks 2018, Chamber and Partners,


Tsai, Lu-Fa; Tsai, Yu-Li; Tsai, C.F. (2018). Copyright 2018, Chamber and Partners,


Tsai, Yu-Li; Tsai, Lu-Fa (2018). Copyright 2018, The International Comparative Legal Guide, https://iclg.com/practice-areas/copyright-laws-and-regulations/taiwan#
Tsai, Yu-Li; Tsai, Lu-Fa (2018). Pharmaceutical Advertising 2018, The International Comparative Legal Guide, https://iclg.com/practice-areas/pharmaceutical-advertising-laws-and-regulations/taiwan;
Tsai, Yu-Li (2015). Patents, trade marks, copyright and designs in Taiwan: overview, Thomson Reuters , http://uk.practicallaw.com/7-617-7876.
Tsai, Yu-Li (2015). IP in business transactions: Taiwan overview, Thomson Reuter, http://uk.practicallaw.com/6-617-7853.
Tsai, Yu-Li (2015). Patents in Taiwan – Lexology Navigator Q&A, http://www.lexology.com/library/detail.aspx?g=ef13ffa4-3a0a-405e-a306-339fb61bd457.
Tsai, Yu-Li & Tsai, Lu-Fa (2014). A practical cross-border insight into copyright law, Chapter 20 Taiwan. The International Comparative Legal Guide to: Copyright 2015 Edition, 1, 111-116.
Tsai, Yu-Li (2014). Patent Features in Taiwan. Lawyer Monthly Magazine Global Expert Guide to IP 2014, 138-141.
Tsai, Yu-Li (2013). Q & A Country Chapters: Taiwan. Intellectual Property Law Guide 2013/2014, LexisNexis, 1, 123-151.
Numerous Newsletters in CorporativeLiveWire. http://www.corporatelivewire.com/;
Numerous Newsletters in The Lawyer Network. https://www.thelawyer-network.com/;
Newsletter in Lawyer Issue. https://www.lawyerissue.com/
Newsletter in Deep &Far’s Website: http://www.deepnfar.com.tw

+886 2 2585 6688, extension 8139
+886 2 2598 9900/+886 2 2597 8989