Address: 1107, B2, Long-Range World Building, No 18 Suzhou Street, Haidian District, Beijing, 100080, China
Postcode: 100089
Telephone: (8610)68473908 88518458 88518575 88516136 82609417
Facsimile: (8610)68473908转802 
Website: www.suthink.com
Email: [email protected]
Our team
Name: Li Shiduan (李世端)
Title: Senior Partner, General Manager, Senior IP Consultant
Practice Fields
    Engaged in trademark opposition,review,dispute resolution,trademark administrative litigation and related litigations involving  trademark infringement ; especially expert in dealing with recognition of well-known trademarks,difficult trademark disputes and the cases involving trademark infringement investigated and punished by the industry and commerce administrative authority; further, having represented hundreds of companies dealing with difficult patent applications and certain disputes involving invalidity of patents.
Specialties & Experiences
    Mr. Li Shiduan is now one of the senior partners of SUTHINK and the professional IP consultant serving for several domestic and overseas companies.
    Until now Mr. Li has accumulated more than ten years experiences in IP practices. Since the beginning of practicing in this field, Mr. Li has dealt with varieties and lots of difficult IP cases either by himself or under his instruction,and formed his special experiences and professional theories in dealing with verification of  IP ownership and  IP administrative protection .Mr. Li has ever prepared detailed IP protection plans for several domestic and overseas famous companies and formed long term cooperation relationship with certain large scale companies. Mr. Li also have attended IP expert symposiums and international IP seminars and forums for many times, and published lots of case analysis papers in IP field.

Name: Liu Xiuzhen (刘秀珍)
Title: Partner, Professional Patent Attorney, Associate Researcher of Patent Representation
Practice Fields
    Engaged in representation for every kind of patent applications, especially expert in dealing with patent review and patent invalidity disputes and the litigation involving patent infringement. Having represented several domestic and overseas famous companies to deal with patent protection events and formed long term cooperation relationship with several large scale companies,and now acting as the professional patent consultant serving for several large scale companies.
Specialties & Experiences
    Ms. Liu graduated from Inner Mongolia University and now is an associate researcher of patent representation and a senior patent attorney. She has been engaged in IP practices for more than twenty years, ever attended many international IP seminars, and gotten training in the patent offices of several foreign countries. Ms. Liu now is one of the partners of SUTHINK and the professional patent consultant serving for several domestic and overseas large scale companies. She has dealt a lot of patent cases on behalf of her clients and accumulated affluent experiences in patent representation, and is especially expert in dealing with patent review, patent invalidity dispute and the litigations involving patent infringement.She is also one of the members of All China Patent Agent Association.

Name: Guo Guanhou (郭官厚)
Title: Partner, Senior Patent Attorney, Senior Engineer
Practice Fields
    Expert in dealing  with  patent  application,review and invalidity disputes in the fields of chemistry, machinery and metallurgy.Having formed long term relationship with several large scale iron & steel companies and being the IP consultant serving for several large scale companies.
Specialties & Experiences
    Mr. Guo Guanhou is one of the partners of SUTHINK for the time being. He has been engaged in IP practices for more than twenty years and ever worked as the general engineer in Baotou Engineering and Research Institute of Iron and Steel Industry and Metallurgy Research Institute for many years. He has never stopped his research in related fields, published certain related papers and monographs, and gained several awards. He has dealt with lots of patent cases on behalf of his clients and accumulated affluent experiences in patent representation, and now is the patent consultant serving for several large scale companies.  He has been appointed by Baogang Group as its patent consultant for a long time, and therefore accumulated affluent representation experiences in the field of metallurgy. Now he is one of the members of All China Patent Agent Association.

Name: Sun Guodong (孙国栋)
Title: Partner, Senior Patent Attorney, Engineer
Practice Fields
    Engaged in every type of patent applications, especially expert in dealing with patent application, review and invalidity disputes in the fields of biology, chemistry, machinery and electronics. Also responsible for review of technical contracts and dealing with disputes and arbitration involving technology assignment and other kinds of technical contracts.
Specialties & Experiences
     Mr. Sun was one of the officers in charge of administration of the technology market in Ordos of Inner Mongolia. He is expert in representation for patent application as well as for dealing with the cases involving patent invalidity, revocation, review and/or infringement in the fields of biology, chemistry, machinery and electronics. He has practiced for many years and therefore accumulated affluent experiences. Mr. Sun is also experienced in trademark fields and has dealt with lots of difficult and complex trademark cases on behalf of his clients.  He has been invited by companies for many times to provide IP lectures and is serving for several famous companies to deal with IP-related events. Mr. Sun was also employed in a U.S. famous patent agency to practice in related fields. He has gone to the U.S., Southeast Asia and other areas to study and make observation. Now he is one of the members of All China Patent Agent Association.