· 1992. 10
DOOROO MACHINERY & TRADING CO. was established
· 1995. 10
Underground Crop Harvester DR-1300A - Type inspection passed
· 1996. 05
Underground Crop Harvester DR-750A,950A,1400A - Type inspection passed
· 1997. 05
05 Underground Crop Harvester DR-1300S,1300SW - Type inspection passed
· 1997. 03
Relocation of new construction of Anseong plant
· 1997. 12
Radish Harvester DRH-101T - Type inspection passed
· 1998. 01
Trademark Registration 'Dooroo' (Korea Intellectual Property Office)
· 1998. 10
Underground crop harvester 'Rotating Shaft Improvement Structure' - Utility Model Registration (Korea Intellectual Property Office)
· 1998. 12
Potato planter DRPP-3000 - Type inspection passed (Agricultural Mechanization Research Institute)
· 1999. 04
Selection of Technology Innovation and Development Projects (Small and Medium Business Administration)
· 2000. 12
Bucket-attached underground crop harvester - Utility Model Registration (Korea Intellectual Property Office)
· 2000. 12
Stalk crusher attached underground crop harvester - Utility Model Registration
· 2001. 02
Minister of Agriculture, Food and Rural Affairs commendation
· 2001. 04
Rural Development Administration's Agricultural Mechanization Research Institute Award for Merit Award
· 2001. 06
'Bulb Harvester' - Utility Model Registration (Korea Intellectual Property Office)
· 2002. 11
Garlic Harvester(for Tractors) DRGH-1800 - Comprehensive test passed (Agricultural Mechanization Research Institute)
· 2002. 11
'Drawing-type Carrot Harvester' - Co-patent Application (Korea Intellectual Property Office)
· 2003. 02
'Radish Harvester' - Co-patent Application (Korea Intellectual Property Office)
· 2003. 04
'Garlic Sorter' - Patent Application (Korea Intellectual Property Office)
· 2003. 04
Selection of Technology Innovation and Development Projects (Small and Medium Business Administration)
· 2003. 04
Garlic Splitter DRSP-350K - Comprehensive test passed (Agricultural Mechanization Research Institute)
· 2003. 04
Garlic Sorter DRGS-350K - Comprehensive test passed (Agricultural Mechanization Research Institute)
· 2003. 04
'Power Transmission Structure of Underground Crop Harvester' - Utility Model Registration (Korea Intellectual Property Office)
· 2003. 04
'Garlic Splitter' - Utility Model Registration (Korea Intellectual Property Office)
· 2003. 06
Garlic Harvester(for tractors) DRGH-1650 - Comprehensive test passed
· 2004. 06
'Garlic Harvester' - Utility Model Registration (Korea Intellectual Property Office)
· 2004. 12
'Drawing-type Carrot Harvester' - Patent Registration (Korea Intellectual Property Office)
· 2004. 12
'Radish Harvester' - Patent Registration (Korea Intellectual Property Office)
· 2004. 12
Awarded for Achievement in the Development of Rural Development Projects (Rurla Development Administration)
· 2005. 02
Awarded for Commendation from the Chairman of the Korea Federation of Small and Medium Businesses
· 2005. 09
'Garlic Sorter' - Patent Registration (Korea Intellectual Property Office)
· 2005. 09
'Sweet Potato Harvester' - Patent Application (Korea Intellectual Property Office)
· 2006. 10
'Single Harvesting Type Pepper Picker' - Co-patent Application (Korea Intellectual Property Office)
· 2008. 03
'Single Harvesting Type Pepper Picker' - Patent Registration (Korea Intellectual Property Office)
· 2008. 04
Application for utility model registration of 'Bed-soil distributor'
· 2008. 06
Application for utility model registration of 'reverse rotatable underground crop harvester'
· 2009. 06
Development of Sweet potato harvester - DR-1300CP/-1400CP
· 2009. 06
Confirmation of venture companies (Korea Technology Finance Corporation)
· 2010. 10
Development of Milkvetch root harvester W Model
· 2010. 11
New construction completion of Asan Plant
· 2011. 01
Asan Factory Commencement
· 2011. 03
Development of Ginseng seedling harvester M model
· 2011. 03
Development of Garlic harvester DRG-900(for cultivator)
· 2011. 05
Development of Sweet potato harvester DRK-600(for cultivator)
· 2013. 02
Development of an underground crop harvester (ginseng and root herb) Q model
· 2014. 03
Operation of a test field for the development of consistent mechanized products for field crop production
· 2014. 04
Development of Sweet potato transplanter (Joint Research with Rural Development Administration)
· 2014. 06
Development of Weeder (Potato, Sweet potato Stalk Crusher)
· 2014. 07
Development of Bed Former
· 2014. 08
Development of collection-type Sweet potato harvester
· 2014. 09
Joint development of a collection-type Green onion harvester (Agriculture, Forestry and Technology Evaluation Institute, Ministry of Agriculture, Food and Rural Affairs)
· 2014. 11
Potato planter (two-row type) - Safety inspection passed (The Foundation of AG. Tech, Commercialization and Transfer)
· 2015. 04
Development of Onion harvester CO model
· 2016. 03
Development of Harvester for Riding cultivator X model, XO model (radish, potato, sweet potato, root herb harvester).
· 2017. 12
Joint development of Automatic Potato planter DRP-1002AR (National Institute of Agricultural Science, Rural Development Administration)
· 2018. 07
Potato planter DRP-2000RN, 1002RN - New Technology Designation (Rural Development Administration)
· 2018. 09
Development of Soybean seeder for paddy-field DRP-2004SB, 3006SB
· 2018. 11
Development of Sweet potato transplanter(Integrated type) DRP-3003SRN
· 2019. 02
Potato havester DR-950AN, 1500AN - New Technology Designation (Rural Development Administration)