Deep & Far Attorneys-at-Law


13th Floor, 27, Sec. 3, Chung San N. Road,

Taipei, Taiwan


Telephone: 886-2-25856688 

Fax: 886-2-25989900/25978989

E-mail: [email protected]  

Web site:


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…


Deep & Far received awards including IP experts in Chambers & Partner, IP experts in Managing IP, IP experts in Asia IP, IP experts in World IP Pages, IP experts in Lawyers Monthly, IP experts in, IP experts in Finance Monthly, IP Expert Guide Global Award - Taiwan IP Law Firm of the Year, Corporate LiveWire Global Awards, ACQ Global Awards, InterContinental Finance 2015 End of Year Awards.


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.


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.


Key Contact Partners


C. F. Tsai, Principal, Attorney at Law, Patent Attorney

Law Tsai, Partner Attorney at Law

Yu-Li Tsai, Partner and Patent Attorney