President of FICPI  KOREA (2018~2021)

The president of alumni association college of pharmacy, Seoul National University (2016~2020)

Vice President, Korean Patent Attorneys Association (KPAA) (2002−2013)

Chairman, Committee of Patent System, KPAA (1994−1996)

International Director, KPAA (1992−1994) 

Founder, Hansung International IP & Law Firm (1990~)

Director, AIPPI Korean Group (1987−2000)

Patent Attorney, Central International Law Firm (1986−1990)

23rd Patent Bar of Korea (1986)

Primary Patent Examiner, Pharmaceutical Chemistry, KIPO (1977−1986)

Pharmacist (1974)

Patent Academy Course, U. S. Patent and Trademark Office, Washington, D.C. (1982)

Legal Assistant Program, George Washington University, Washington, D.C., USA (1982) 

B.S., Pharmacy, Seoul National University (1974)

Patent Strategy for Pharmaceutical Industry (1992)

Policy of Encouraging Improvement Inventions as Reflected by Judicial Precedents in Korea, No. 2, Tokyo KANRI, Japan (1990)

Major Changes in the Korean Patent System (1987)

Introduction to the U.S. Patent System (1982)

The Development of β-lactam Antibiotics (1981, 1983)

Korean Patent Attorneys Association (KPAA) 

Korean, English