1989                             / Seoul National University, M.S., Electrical Engineering

1987                             / Seoul National University, B.S., Electrical Engineering

Present                        Partner, Yoon & Yang (IP) LLC (since 2006); 

                                    Associate, Yoon & Yang Patent Office (2004–2005)

2003-2004                   / Solicitor, Intellectual Property Tribunal 

2002-2003                   / Primary Patent Examiner, Electric & Electronic Examination Bureau, Korean Intellectual Property Office (KIPO); 

                                        Senior Patent Examiner, Electronic Image Device Examination Division (KIPO) (2000-2002); Patent Examiner, Semiconductor                                                     Examination Division (KIPO) (1999-2000); Patent Examiner, Electric & Electronic Examination Bureau, (KIPO) (1996-1999)

2002~2003                  / Primary Patent Examiner, Korean Intellectual Property Office, Electric & Electronic Examination Bureau

1994-1996                   / Senior Patent Examiner, Electronic Image Device Examination Division 

1999~2000                  / Patent Examiner, Semiconductor Examination Division

1996~1999                  / Patent Examiner, Electric & Electronic Examination Bureau

1994~1996                  / Deputy Director, Ministry of Commerce, Industry and Energy

1993-1994                   / Deputy director, Ministry of Government Administration and Home Affairs

1992                             / Passed the 28th Technology Examination