Lee International

You-Jung JANG

Patent Attorney

You-Jung Jang is in charge of filing domestic/foreign patents in the fields of chemistry and chemical engineering, intermediate cases, etc.

After being admitted to the Korean Patent Bar, Ms. Jang worked at the chemistry department of Kasan Patent Office (2017) and Halla Patent & Law Firm (2018-2019) where she conducted a wide range of tasks including prior art research, patent filing, domestic/foreign intermediate case responses and preparation of investigation reports on the possibility of patent nullification owned by other companies in diverse sectors such as fuel cells, secondary batteries, polymer compounds, semiconductor processes and the shipping industry.

Ms. Jang is a graduate of Yonsei University (B.S., Chemical Engineering, 2015) and is a current member of the Korea Patent Attorney Association.

T. 82-2-2262-6223

F. 82-2-2273-4605

Practice Area

  • General filing and registration of domestic/foreign patents in the fields of chemistry and chemical engineering


  • Yonsei University (B.S., Chemical Engineering, ABEEK Advanced Course Completed, 2015)


  • Lee International IP & Law (2019~Present)

  • Halla Patent & Law Firm (2018~2019)

  • Kasan Patent Office (2017)


  • Admitted as a Korean Patent & Trademark Attorney (2016)


  • Korea Patent Attorney Association (KPAA)


  • Languages : Korean, English
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