| 1999 | 11 | Established Donga Electric as an individual business |
|---|---|---|
| 2005 | 01 | Incorporated as Donga Heavy Industries Co., Ltd. |
| 2006 | 12 | Capital increase (100 million → 400 million won) |
| 2007 | 03 | Built a new factory in Gimhae Anha Agricultural Industrial Complex (Site 3,844.8㎡, Factory 1,809.3㎡) |
| 05 | Changed business name to Donga HI Co., Ltd. | |
| 2008 | 05 | Obtained overseas standard mark (ISO 9001) |
| 06 | Opened R&D Department and selected as a venture company | |
| 07 | Obtained patent rights(LIFTING METHOD USING HOIST APPARATUS) | |
| Applied for a patent(SINGLE UNIT CLAMP OF CRANE RAIL) | ||
| 09 | Gained recognition as a clean business place | |
| 11 | Issued a direct production certificate (From Korea Federation of SMEs) | |
| 12 | Obtained INNOBIZ certificate | |
| Achieved 20 billion won of sales | ||
| 2010 | 04 | Obtained approval for a prototype of wire rope inserting apparatus for industrial machinery (Korea Occupational Safety & Health Agency ) |
| 10 | Obtained patent rights(GIRDER WITH REINFORCEMENT STRUCTURE BY FILLING) | |
| 2011 | 06 | Relocated factory to Sapo General Industrial Complex, Miryang(Site 9,535.6㎡, Factory 5,092.58㎡, Office 552.86㎡) |
| 2012 | Designated as a company for special case on military service | |
| 2013 | Achieved $50 million expert | |
| 2015 | Obtained patent rights(Magnet Port Slewing Gear) | |
| 2016 | 12 | Relocated factory to Gimhae Techno Valley, Jillye-myeon, Gimhae-si(Site 9,918㎡, Factory 7,094.6㎡, Office 549.4㎡) |
| 2021 | 09 | Relocated factory to Jeokhyeon-ro, Seongsan-gu, Changwon-si, Gyeongsangnam-do(Site 29,001㎡, Factory 15,605.44㎡, Office 621㎡) |
