- Jarvis sapphire
- Address:
- Fiberpro, Inc.
- Address:59-4,Jang-dong ,Yuseong-gu
- A-flow Korea
- Address:SIGMA2 C-613, GUMI 18, BUNDANG, SEONGNAM
- Snu Precision Co.,Ltd.
- Address:#201 Dong-a town,Bongcheon 7-dong ,Gwanak-gu
- SU OPTICS
- Address:Palyong-Dong 58-4
- Ha Young Corp., Korea
- Address:B-626, PoongLim I-Want Bldg. , SeoHyun-Dong, BunDang-Ku,
- Q-Tec Electronic Co
- Address:274-22,Daeya-dong ,Siheung-si
- FIBERPIA
- Address:702, Tamnip-dong, Yuseong-gu
- HISCO Sensor Institute Inc.
- Address:#922, Centerplus, 3-4, Gyeongin-Ro82Gil
- Hwa Jin Enterprise Co.,Ltd
- Address:1573-10,Songjeong-dong ,Gangseo-gu
- Bando Electronic Communicaton Co., Ltd.
- Address:152-4,Chunui-dong ,Wonmi-gu, Bucheon-si
- Shinchang ENG Co
- Address:
- Seo Chang Electronics Co., Ltd.
- Address:597-6,Daecheon-dong ,Dalseo-gu
- winterstory
- Address:Seoul
- Tongyang Electro Chemical Co, Ltd.
- Address:849,Janghang-dong ,Ilsan-gu, Goyang-si
- Samyang Optics Co., Ltd.
- Address:654-4 Bongam-dong,Bongam-dong ,Masan-si
- G-AUTO CO LTD
- Address:970-30 Wolchul-dong
- one n zero
- Address:
- HANARO TRADING CO.,LTD
- Address:103-1510 Digital Empire II 486 Shin Dong, Youngtong-Gu
- DEAKWANG
- Address: