- OPTOLOGICS CO.,LTD
- Address:# 607, 572-5, Anyangdong, Manangu,
- hankwang / korea optics
- Address:#202-F-2 villa jungang heights,kumidong81 bundangku
- WITO Corporation
- Address:829-5 Panghwa-Dong, Kangseo-Ku, Seoul, Korea
- Oriental Optical Co.,
- Address:212-1, Kuro-dong, Kuro-ku,
- NANOPHOTONICS CO., LTD.
- Address:Rm 204, Jeonwon Village, 738 yongun-dong, Dong-gu
1