- Tae Kwang Electronic Co.
- Address:306-16, Munhyun-dong, Nam-gu
- Ace 4 Technology Co., Ltd.
- Address:211, Seongnam venture building, 587, Sujin1-dong, Sujeong-gu
- Technet Korea Inc.
- Address:Rm 908, Ace Techno Tower, 197-17, Guro 3-dong, Guro-gu
- FIBERPIA
- Address:702, Tamnip-dong, Yuseong-gu
- Seo Chang Electronics Co., Ltd.
- Address:597-6,Daecheon-dong ,Dalseo-gu
- Tongyang Electro Chemical Co, Ltd.
- Address:849,Janghang-dong ,Ilsan-gu, Goyang-si
- G-AUTO CO LTD
- Address:970-30 Wolchul-dong
- jaeun.co
- Address:
- Dong Ha Trading Co., Ltd
- Address:RM 712, JEIL BLDG, 44-35, YOEUIDO-DONG, YUNGDEUNGPO-KU
- National Instruments
- Address:169,Samseong-dong ,Gangnam-gu
- Technology Korea Corporation
- Address:# 403, 709-7, Jakjeon-Dong, Gyeyang-Ku,
- PHOENIX TECHNOLOGIES INC
- Address:# 605, DMC R& D Center, 1649 Sangam-Dong
- LIGHTSTAR
- Address:376-4 dongburi
- T H T(Tomorrow High Technology)
- Address:da dong 1403 ho chung-ang circulation complex 1258 kuroku kurodong
- Fine Instruments Corporation
- Address:341-5,Songnae-dong ,Sosa-gu, Bucheon-si
- C&K International Co.,Ltd
- Address:69-21, Goejung-dong, Seo-gu
- Saeshin Precision Co., Ltd.
- Address:93-15, Paho-dong, Dalseo-gu
- leed electronic corporation
- Address:NO. 7 gangdong street
- Shin Han Precision Co.,Ltd
- Address:734,Dohwa-dong ,Nam-gu
- PPI Inc.
- Address:958-10, Daechon-dong, Buk-gu