05. Field Test at Hankook Tire & Technology(Techno Ring)
06. Selected as a Social Venture Founded Linked Business
06. Certification of Social Venture Company
08. Exported test samples to Régie Autonome des Transports Parisiens(RATP), France
09. Assignation as an Innovative procurement product by Public Procurement Service
12. Signed MOU with Social enterprise Ubuntu

02. Ontact Batch Program selected by Daejeon Techno Park
05. Selected as an Early Start-up Package Support project in 2021
06. Selected as a Technology Convergence Social Venture Start-up Support project in 2021
06. Selected as the 2nd Social Impact Changers in 2021
07. Signed NDA with Régie Autonome des Transports Parisiens (RATP), France
08. Selected as a Social Venture Accelerating Program in ESG field
10. Selected as a Social Venture Test-Bed Support project in 2021
11. Honorable Mention from Idea Competition in 2021 ‘Challenge Korea’, sponsored by Korea Ministry of the Interior and Safety

01. Field test performed at Dangjin Thermal Power Plant
02. Seoul Global Challenge Winner (Challenge Award)
02. Presentation of innovative technology ideas for fine dust at the National Climate and Environment Conference
04. Signed an agreement with KILSA (Korea Innovation Launchpad in Singapore Association)
04. Selected as a 2020 Start-up Investment Attraction Support project by Daejeon Techno Park
05. Established R&BD and Open Innovation Center
06. Field test at Bando Yubora new construction (Sapajeong, Changwon)
09. Selected as an Eco Start-up Support by Korea Environmental Industry and Technology Institute
10. Mask Filtration Test - Seoul National University Department of Apparel
11. Selected as a promising investment company for Eco Start-up Demo-day by Eco Start-up IR Round Table

03. Discussion on fine dust testing at Dangjin Thermal Power Plant
05. Prototype production and warehousing (USA TECHMER PM)
06. Signed an exclusive license agreement with the University of Arizona, USA
06. Signed MOU with Seoul Transportation Corporation
07. Issuance of official test report (Korea Research Institute of Chemical Convergence Testing, KTR)
08. Dangjin Thermal Power Plant selected as a Test-Bed Participating Company
09. Signed MOU with Dangjin Thermal Power Plant
12. Field test conducted by Seoul Transportation Corporation

10. Established CLEAN EARTH TECH Co., Ltd. (fine dust reduction research and development)
11. Briefing session at Daejeon Railway Research Institute/KEPCO Research Institute
12. Seoul Subway; Fine Dust/KEPCO Research Institute; Experimental consultation about coal, etc.
12. Consignment and sample testing at the University of Arizona, USA