1986

• Jan.
• Foundation of Dongwoo Machine Industry Co., Ltd.

• Mar.
• Selected supplier of Daewoo Shipbuilding Industry Co., Ltd.

• Dec.
• Selected supplier of Samsung Heavy Industries Co., Ltd. and Samsung Clark Co., Ltd.

1987

• Mar.
• Relocation to new manufactory(Changwon Charyong Complex, 19-2, Bangye-ro, Uichang-gu, Changwon-si

1990

• Dec.
• Selected as an outstanding technology enterprise by Korea Technology Credit Guarantee Fund

• Selected as a promising small business by IBK

1995

• Mar.
• Relocation of the headquarter and the first manufactory(13, Pyeongsan-ro 38beon-gil, Uichang-gu, Changwon-si)

1996

• Jul.
• HOSE H.CRANE & P/V CRANE manufacturing technology agreement with MACGREGOR HAGGLUNDS, a Swedish company

1998

• Sep.
• Registered supplier of the Volvogroup's Korean branch

1999

• May
• Obtainment of ISO 9001(Quality Management Systems) certification [Certificate authority: LRQA]

• Oct.
• Obtainment of C.E. MARK(EC TYPE) [DNV]

• Nov.
• Enlargement of manufactory site

• Awarded "$1million export tower"

2001

• Mar.
• Awarded a citation from Changwon District Tax Office for sincere tax payment

2002

• Mar.
• Designated as a promising export firm by Gyeongsangnam-do small and medium businesses export support center

2003

• Feb.
• Obtainment of ISO 14001 certification & conversion of ISO 9001(2000) certification [Certificate authority: LRQA]

2009

• Jul.
• The introduction of a welding robot system

2012

• Mar.
• Enlargement of a manufactory(C-dong with a floor space of 590 pyeong)

2018

• Jul.
• Change of company name into Gahyun Co., Ltd.