- PPI Inc.
- Address:958-10, Daechon-dong, Buk-gu
- Yeji Corporation
- Address:3F, #135-4Yonhee 3Dong Seodaemun Ku
- AIJOARA
- Address:
- Infrared System Co., Ltd.
- Address:#302~303, GL Richvil 760-1, Hangshing-dong, Duckyang-gu
- AGoptics
- Address:731-8 Ancheong Dong, Gwansan-Gu
- Suntech Engineering Co., Ltd.
- Address:
- jaeyeon tech eng co ltd
- Address:Songchong
- The Sun Industrial Co. Ltd.
- Address:Garak-Dong
- Tokyo Keiso Korea Co., Ltd.
- Address:46,Yangpyeong-dong 3-ga ,Yeongdeungpo-gu
- Groxton
- Address:
- Optron-Tec. Inc.
- Address:Paryong-dong,Paryong-dong ,Changwon-si
- Acculine
- Address:Worldcup-Ro 206 Sanhankwon214
- Wise Sensor Inc.
- Address:199,Sanggal-ri ,Giheung-eup ,Yongin-si
- HANINT Co., Ltd.
- Address:# 1614, LG Palace B / D, 165-8, Donggyo-Dong, Mapo-Gu,
- Scanjet Macron
- Address:246-8, Dalsan-ri, Jeonggwan-myun
- Hanseo Precision Meter co.,ltd.
- Address:
- Pim Korea Co.,Ltd
- Address:123-2,Seonhwa-ri ,Jillyang-eup ,Gyeongsan-si
- Jinyung Engineering Co., Ltd.
- Address:342-1,Sucheong-dong ,Osan-si
- LNTECH CO., LTD.
- Address:Geumjeong-Dong
- qrotech co.,ltd
- Address:Techno-park 201-702 Yakdae-dong, Wonmi-gu