As a Lee & Ko IP patent attorney, Jieun Jang advises and assists clients on a broad range of intellectual property matters, including portfolio management, litigation, patent prosecutions, licensing and IP-related formal opinions. She has acted as legal advisor for a diverse range of domestic and foreign clients in connection with numerous patent prosecutions and trials. She has also acquired particularly extensive experience in handling foreign patent prosecutions, including many prosecutions and trials carried out in technology-leading overseas jurisdictions, such as the US, the EU, Japan, and China.

Jieun is able to expertly advise clients on every aspect of the patent application and registration process, from the earliest stages of technology development to post-registration measures for the protection, maintenance and enforcement of patent rights, including representation of clients in related litigation. She has also established an excellent track record of assisting clients in successfully building IP portfolios in conjunction with investigating related art and devising appropriate patent strategies, conducting prior art searches for challenging the validity of competing patents in connection with patent trial procedures, and furnishing expert analysis of allegedly infringing products in patent infringement cases.