| 2017 | 11-23 | Established Dooribun Tech Co., Ltd. (Capital of KRW 10 million) |
|---|---|---|
| 2018 | 1-22 | 2 applications for patents on core technologies |
| 5-18 | Patent registration of emergency monitoring system using dual pulse | |
| 5-29 | capital increase to KRW 100 million won | |
| CEO Choi Hyun-Su takes office | ||
| 2019 | 1-18 | Development success of optical cable sensor using dual pulse (Proto type VS) |
| 1-25 | Patent registration of emergency monitoring system using optical fiber | |
| 3-25 | capital increase to KRW 200 million won | |
| 7-13 | capital increase to KRW 500 million won | |
| Headquarter to Cheongju, North Chungcheong Province | ||
| 2019 | 9-25 | Participating in the Korea Safety Industry Fair (SOC Integrated Technology Market booth |
| 11-10 | "Light Signal-Based Monitoring System and Monitoring Methods" Patent Application | |
| 12-05 | Accreditation of "Venture Company Verification" (Technical Assurance Fund) |