1980 Established yongsung electric(482-58, Tasari-dong, Dongdaemun-gu, Seoul, Korea)
1986 Obtained Korean Electrical Product Manufacturing License
1988 Recognition of Korean electrical products
1989 Obtained Korean Industrial Specifications
1992 Obtained Korea's measuring instrument manufacturing license (Gyeonggi-do)
1993 Passed nuclear power level test (F & H USA)
1996 Designated as a Korean SME and Quality Standard Certification (Gyeonggi-do)
1997 Obtained "ISO9002" certificate (Korea Electrical and Electronic Test Research Institute)
1998 Certified for Nuclear Energy Rating (Level-1E)-Shinhan Certified as a Promising Small and Medium Enterprise (Korea Electric Power Company)
1999 Designated as Korea's technologically competitive company (Small and Medium Business Administration)
Registered as a supplier of Korean nuclear power plant components (level-1E)-KORI nuclear power plant
Obtained UL certification (USA, Canada)-Relay
Obtained "ISO9001 Certification (RAB)"-HSB-RS Korea
Obtained KEPIC Nuclear Energy Performance Quality Certificate--Korean Electric Power Association
Obtained UL certification (USA, Canada)-micro switch
2000 Designated as a promising power venture company (Korean Power Corporation)
2003 Obtained CCC certification (China Compulsory Certification)-relay, transfer switch and Ø22 series
2004 Obtained UL certification—indicators, changeover switches, control switches (USA, Canada)
Won the Korea Electrical Culture Award (Minister of Science and Technology)
2005 Electrical Product Certification (Industrial Technology Testing Institute)
Registered as a supplier company of Korea Hydro Atomic Power Co., Ltd. (quality level: Q)
Obtained CE certification (indicators, transfer switches, control switches)
Obtained CE certificate (cross switch)
2006 Won the Management Innovation Award
Obtained CCC certification (China Compulsory Certification) (travel switch, Ø16 series, square light, rectangular light)
Obtained UL certification-AP12, AP13, AR2, AR3, AK2, AK3 switches
Obtained CE certification-AP12, AP13, AR2, AR3, AK3 switches
2007 Acquired UL certification-P222, push button switch or indicator
CE certified P222, pushbutton switch or indicator
2008 Product Certification
Headquarters and factory moved to 348-3, Samsil-eup, Secun-eup, Guangzhou, Gyeonggi
2010 Korea Longsheng Electric Co., Ltd. was registered as a supplier of Westinghouse Electric
2011 Awarded the Golden Tower Industrial Medal