- EOP Co., Ltd.
- Address:3F# 360-4, Hosan-dong, Dalseo-gu
- ISS Corporation
- Address:5th Floor, Sungho Building, 4531, Sujin 2 Dong, Sujungku
- GOLD LAND
- Address:1-19 Seogeun-ri, Paltan-myeon, Hwaseong-si, Gyeonggi-do, Korea
- Solutech Co.,Ltd
- Address:Dangsan-dong ,Yeongdeungpo-gu
- Newton Technology
- Address:402, Daeryung Techno Tower 13th, 664 Gasan-dong, Geumcheon-gu
- KT Mobile
- Address:Jinwoo Bldg.2f, Sinsadong, Kangnamgu
- Sung Sill Engineering Co.
- Address:188 Eungam-1Dong, Eunpyeong-go
- READU CO LTD
- Address:1-32, Geumjeong-doing
- KB Photonics
- Address:3rd Floor, 178-6, Suksoo-1dong, Manan-Gu,