Mason Xi
Partner
Patent Attorney
Email: mason.xi@lexfieldlaw.com
Tel.: +86 10 8579 4592

Emphasis
● Patent infringement litigation
● Patent invalidation and related administrative litigation
● Patent infringement analysis and stableness analysis

Career
Mr. Mason Xi has more than 10 years’ experience in counselling multi-national and domestic companies for intellectual property protection and enforcement in the fields of Telecommunication and Mechanics.  Before joining LexField, Mason Xi worked in Beijing King and Wood (Shenzhen) Law Firm, Beijing IParagon Law Firm and Beijing Commerce and Finance Law Offices.
Professional Highlights
● Represented Ericsson in multiple telecom SEP invalidations;
● Advised Panasonic and OPPO in telecom SEP mapping and patent validity analysis;
● Represented EPSON in multiple patent infringement litigations, associated invalidations and administrative litigations;
● Represented YKK in administrative complaints and litigations, patent invalidations;
● Represented Tetra in multiple patent invalidations;
● Represented a local company in patent infringement litigations and associated patent invalidations with Tencent;
● Represented Singamas in patent infringement litigations and associated patent invalidations;
● Represented DiDi in patent infringement litigations and associated patent invalidations.

Education
Tsinghua University Automobile Engineering Department, B.S. in Engineering (2007)
Tsinghua University Law School, Juris Master in IP Law (2010)

Languages
Mandarin, English