1990.02.15
· Established
1992.03.27
· STX Engine Inc. Partnership
1993.08.10
· Ssangyong automobile Inc. Partnership
1994.07.15
· STX Engine excellent supplier selected
1997.04.22
· Ssangyong automobile Inc. excellent supplier selected
1998.10.23
· Rubber Compensator development (KR, GL, LR, DNV, ABS, BV Type Approval)
2002.03.10
· Kookmin Bank as a promising SME registration
2003.03.12
· ISO 9001 (URS) Certification Acquired
2006.07.01
· Changed (Dong Yang Special Rubber → Dong Yang S&T)
2009.09.15
· Flexible Coupling unique model development
2010.02.12
· RINA, CCS, NK type approval