- Sekonix Co., Ltd.
- Address:146-16, Sangbongarm-Dong
- Jaesung Engineering Co.
- Address:The'O valley 410, Hogye-dong, Dongan-ku
- DREAMCON CO., LTD.
- Address:# 469-1 Sanmak Dong
- Sectron Co., Ltd
- Address:120-1, Dongsun Bldg, Chunui-dong, Wonmi-gu
- Kusung Technics co., Ltd.
- Address:586-15, Gwansan-dong, Deogyang-gu
- Deakwang Measuring Instrument
- Address:Rm-401, Kolon Digital Tower Villant-II, Guro3-Dong, Guro-Gu, Seoul, Korea
- Mega Power
- Address:C-403 Hiberass 1062, Gyesandong
- MyungSung Hyoda Instruments Corp
- Address:405-ho, 304-Dong, Bucheon Techno Park, 365 Samjeong-dong, Ojeong-gu
- Seoul Precision Opics
- Address:120-1 Chobu ri
- Danil Smc Co., Ltd.
- Address:3F,, J B/D, 35-25 Jamwon-dong, Seocho-gu
- DT&T
- Address:118b-10l,688-10, Gojan-dong, Namdong-gu
- MCSCO
- Address:Hwamyung
- Havit Information Co., Ltd.
- Address:59-3,Jang-dong ,Yuseong-gu
- Medizs
- Address:702, Tamnip-dong
- Micro Optics Co., Ltd
- Address:473-4 Bora-ri, Giheung-gu, Yongin-si
- JN Tech Company
- Address:1589-14, Seocho-dong, Seocho-gu,
- miottica korea co., LTD.
- Address:84 Gajwa-Dong, Ilsanseo-Gu, Goyang-City, Gyeonggi-Do, KOREA
- Atto Co., Ltd.
- Address:Rm. 302, 2 Da, Shiwha Industrial Complex, 1263-1 Jeongwang-dong ,Siheung-si
- Jinsung Meditech Inc.
- Address:FL4,SINJUNG B/D,238-4,SOKKWAN-DONG SONGBUK-GU
- Credix Co., Ltd.
- Address:62-225,Bongilcheon-ri ,Jori-eup ,Paju-si