- Seertech
- Address:693-2,Geumjeong-dong ,Gunpo-si
- Dae Il Science Co., Ltd.
- Address:164-1,Poi-dong ,Gangnam-gu
- Taekyoung Machinery Co., Ltd
- Address:Sungdong-ku Sungsu2ka3dong 289-293
- Sung Hoon Co,Ltd
- Address:1-75 Buk-ri,Buk-ri ,Nongong-eup ,Dalseong-gun
- AMTEK
- Address:# 102-603, Digital Empire II, 486, Shin-Dong
- NANOBASE, INC
- Address:Gasan-dong, Gumcheon-gu
- snmcorea
- Address:294-4, Siksa-dong
- Jingu Scientific Co., Ltd.
- Address:438-1,Topyeong-dong ,Guri-si
- Green Sensor Co, Ltd.
- Address:203-803 B / L Technopark 192 Yakdae-Dong, Wonmi-Gu
- kim davids,ltd
- Address:Bumchun-Dong
- Covis Optic Co., Ltd.
- Address:922-1,Samcheong-ri,Okcheon-eup ,Okcheon-gun
- G2 Optic Co., Ltd.
- Address:
- SSAUL BESTECH
- Address:SK-Twin Tower 206,
- leed electronic corporation
- Address:NO. 7 gangdong street
- HIFLUX
- Address:Sinil-dong
- Frontics Co., Ltd.
- Address:Gasan Digital Valley
- el, Inc.
- Address:
- Music City
- Address:3rd Fl. 354-2 Seogyo-dong
- Microptics Co.,Ltd.
- Address:5F, Yunmin Techno Town, 473-4, Bora-dong, Giheung-gu,
- Shin Han Precision Co.,Ltd
- Address:734,Dohwa-dong ,Nam-gu