David XU  |  President/Managing Partner, Patent Attorney


Mr. Xu's main areas of practice cover medical device, mechanics, electronics, communication and semiconductor, etc. Mr. Xu has extensive experience in dealing with multinational and domestic complicated patent issues, including patent application drafting,patent prosecution, patent re-examination and invalidation, analysis on patent validation and infringement, patent administrative and civil litigation, etc. Mr. Xu has represented a large number of well-known companies worldwide.

Lixin ZHANG  |  Vice President/Senior Consultant, Patent Attorney/Attorney at Law


Ms. Zhang's main areas of practice cover telecommunication, electronics & computer science, software engineering, Internet & E-commerce, electronics, mechanics, chemical engineering, etc. Ms. Zhang has extensive experience in patent drafting and prosecution, patent reexamination and invalidation, patent search and investigation, claim chart construction, patent mining and patent mapping, and client counseling. Ms. Zhang has handled patent prosecution before SIPO as representative of many famous global companies.

Frances GU  |  Partner, Trademark Attorney


Ms. Gu has been assisting the multinational and domestic clients for more than a decade with global and local trademark and copyright prosecution and litigation, covering trademark registration availability searches, applications for trademark registration, trademark assignment, licensing, renewal, modification, customs recordation, oppositions, cancellation and invalidation actions, administrative and civil litigations, copyright recordation and the consultancy of all the aforesaid issues, etc.

Vivian ZHANG  |  Partner, Patent Attorney


Ms. Zhang's major areas of practice are electronics, computer science, communication, semiconductor and automation, etc. Ms. Zhang has nearly ten years experience in providing legal services for multinational and domestic clients, specializing in patent prosecution, patent re-examination and invalidation and infringement analysis, etc.

Yuejun YU  |  Partner, Patent Attorney


Ms. Yu's main areas of practice cover pharmaceuticals, medical devices, chemical, material,polymer,Nano Tech,semiconductor,mechanics,electronic devices, etc. Ms. Yu has nearly ten years experience in dealing with foreign and domestic clients, including patent application drafting, patent prosecution, patent re-examination and invalidation, analysis on patent validation and infringement, patent administrative and civil litigation, etc. Ms. Yu has represented a large number of well-known companies worldwide.

Isabella FU  |  Partner, Patent Attorney


Ms. Fu's major areas of practice cover semiconductor, mechanics, medical device and material science, etc. Ms. Fu has more than five years experience in patent prosecution including invention, utility model and design, and she has the expertise in patent drafting, responding to office actions, patent re-examination and invalidation, etc.