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About Us

Firm Overview

About Us

LexField Law Offices is a Beijing-based law firm focused on intellectual property, with a clientele representing a broad array of industries. Under our previous name, Jan Liu & Associates, we have earned respect around the world as a boutique IP firm specializing in trademarks, copyright issues, anti-unfair competition matters. With the July 2009 merger of our IP litigation team and a seasoned patent team, we have taken on a new name to reflect that we now provide a full spectrum of IP legal services, including patent work and IP litigation.

Firm Overview

We represent our clients in trademark and patent prosecutions and offer counseling in regard to full IP matters, IP litigation and dispute resolution. Our trademark and patent attorneys are familiar with an extensive range of IP strategies, so the advice we give our clients is more comprehensive, more thorough, more effective. The result: Our clients' IP rights are secured, better able to resist infringement claims and in an enhanced position to accrue added value.

Our Trademark & Dispute Resolution Group is a highly recognized, with a proud reputation among many of the world's leading corporations for prosecution and enforcement issues throughout China. Aside from trademark prosecution and dispute resolution, we are skilled in trademark clearance legal opinion work and experienced in resolving complicated disputes, copyrights and anti-unfair competition disputes. We also have a proven track record of strategies that help clients select brands that generate the strongest identities in their respective markets, best protect clients' brands and related rights, avoid risk of infringement claims and protect clients' products from unfair competition. In addition, our Trademark & Dispute Resolution Group has great deal of experience in working with the China Trademark Office, Trademark Review and Adjudication Board and various levels of AIC (Administration for Industry & Commerce).

Our IP Litigation & Dispute Resolution Group is led by the pioneers in the field of Chinese IP litigation. Several of our litigators have both law and technology credentials. With our patent expertise and our in-depth knowledge of law and technology, we have successfully handled numerous patent litigations, including precedent-setting cases at every level of the Chinese court system, all the way to the PRC Supreme Court. 

Our Patent Group includes attorneys and patent agents with advanced academic degrees and distinguished credentials that span the gamut of major technical fields. In conjunction with the depth of experience of our patent litigation, our patent attorneys and agents are geared to provide clients with comprehensive patent strategies that succeed – strategies that help clients avoid infringement claims and having their patent rights infringed upon. At the same time, our Patent Group has vast experience in working with the Intellectual Property Office, which helps our clients prosecute patents efficiently and quickly.


  • +86-010-8525 3366

  • +86-010-8525 1550/1552


  • Suite 1009, China Life Tower, 16 Chao Yang Men Wai Street, Chaoyang District, Beijing 100020, P.R.China