- 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
- T H T(Tomorrow High Technology)
- Address:da dong 1403 ho chung-ang circulation complex 1258 kuroku kurodong
- C&K International Co.,Ltd
- Address:69-21, Goejung-dong, Seo-gu
- PPI Inc.
- Address:958-10, Daechon-dong, Buk-gu
- SEAWON Industrial Co., Ltd.
- Address:586-2, Munhyung-Ri, Opo-Eup
- MK Electronics Co.
- Address:#301,5th,Acetechno Tower,197-22,Gurodong,Gurogu
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