- Incheon surveying Instrument Inc.
- Address:
- Chang Dae Hi-tech
- Address:604b-13, Banweol Industrial Region, Sunggok-dong
- DAEIL SYSTEMS CO., LTD.
- Address:27-26 Nan-Dong, Cheoin-Gu
- Aegis Corea Ltd.,
- Address:4floor,99-9 Dodang Dong, Wonmi Gu,
- Sanju Co., Ltd.
- Address:SANJU B/D,Seocho 3-dong ,Seocho-gu
- The Zone Systems Inc.
- Address:
- Hanbando Co., Ltd.
- Address:742-5,Wonsi-dong ,Danwon-gu, Ansan-si
- Jeol Korea Ltd.
- Address:Dongwoo Bldg 7F,Gil-dong ,Gangdong-gu
- Dongwon Systems Corp.
- Address:245, Yangjae-dong, Seocho-gu,
- Daiichi Optical Co., Ltd.
- Address:26-20,Ho-dong ,Jung-gu
- EmCrafts
- Address:#103 Samhwan digital venture tower, 280-13 Sungsu 2ga Sungdong-gu
- HAE SUNG MEDICAL CO.
- Address:21-9, Sejong-daero 2-gil
- Jarvis sapphire
- Address:
- SU OPTICS
- Address:Palyong-Dong 58-4
- Samyang Optics Co., Ltd.
- Address:654-4 Bongam-dong,Bongam-dong ,Masan-si
- HANARO TRADING CO.,LTD
- Address:103-1510 Digital Empire II 486 Shin Dong, Youngtong-Gu
- Aperio
- Address:4 212-15 Ichondong Yongsangu Seoul Seoul Korea
- Jinsang Co.,Ltd
- Address:san1-1,Gwaebeop-dong ,Sasang-gu
- SAMSUNGEYETECH CO., LTD
- Address:466-2 donghuyn-ri, Changki-myun
- prism technology
- Address: