1999

10. 26

Received patent for grounding trouble detection device(DGPS) of direct current circuit
(KIPO, No.0240266)

10. 04

Moved to more extended new building(152BL-5LOT #725-5, Kojan-dong, Namdong-ku,
Inchon, Korea)

08. 10

Received patent for time delay control relay(DTCR) of power transmission equipment
(KIPO, No.0228473)

06. 08

Selected as a prospective venture company (KEPCO)

03. 12

Automatic voltage controller for main transformer with a motor driven on-load tap changer development completion (KEPCO)

1998

06. 18

Selected as a prospective venture company (KEPCO, Inchon District SMBA)

1997

11. 27

Technology center selected as military service exempted research center

10. 20

Received medal of recognition for achieving KEPCO transformer device capacity of
100 million kV (KEPCO 345kV construction Site)

05. 22

Selected as a company of prospective advanced technology (SMBA)

02. 26

Received honorable commendation for the development of heavy electric industry (KEMC)

1996

11. 29

Established YOUSUNG instrument & electric Co., Ltd technology center

02. 09

Selected as a prospective small and middle business (SMIPC)

1995

07. 27

YOUSUNG instrument & electric Co., Ltd changed to corporation

06. 10

Acquired KSA/ISO 9001 certification for quality control system

1991

03. 10

Acquired bidding participation qualification from KEPCO

1990

10. 18

Member of korea electrical manufacturers cooperative (KEMC)

1989

08. 05

Established YOUSUNG instrument & electric Co., Ltd