- PTG Global(H.Q)
- Address:375 Seoseok Dong Dong Gu
- VINARI
- Address:VINARI , 508 HEESUNG PLAZA , 321-2 Wolgye 3(sam)-dong,
- Korea Measuring Instrument
- Address:54-3, Gokbanjeong-ro 19beon-gil, Gwonseon-gu, Suwon-si, Gyeonggi-do, South Korea
- younchal bae
- Address:2F 991-11 ingye-dong, paldal-gu,
- Quartz Tech Co., Ltd.
- Address:323-10,Songnae-dong ,Sosa-gu, Bucheon-si
- Imp Engineering
- Address:275-2,Yangjae-dong ,Seocho-gu
- Yulimhitech Co., Ltd.
- Address:1130-24,Guro 3-dong ,Guro-gu
- set tech co.,ltd
- Address:2nd Floor 831-7, Dohwa-dong, Nam-gu, Incheon 402-060, KOREA
- Asitra Corporation
- Address:295-29, Gamsam-dong, Dalseo-gu
- Dasol Electronics
- Address:1020-9 3F, Bangbae-dong
- Seoul Optical Ind. Co., Ltd.
- Address:68-1, PYONGAM-RI, SAENGGUK-MYON, UMSONG-GUN
- Onyou International Co.
- Address:gumi-dong201 pundang-gu seonam-city
- Prime Tec Corporation
- Address:586, Doyangdong, Gyeyanggu, Incheon, South Korea
- SeAH METAL
- Address:26-2 Kuro-Dong, Kuro-Ku,
- Kitelco Co., Ltd
- Address:16-1,Dangjeong-dong ,Gunpo-si
- Kmt Co., Ltd.
- Address:B-203, Woolim Lion's Valley, 144-5 Sangdaewon-dong, Jungwon-ku
- DHE Co.,Ltd
- Address:# 396 Seocheon-Dong, Giheung-Gu,
- Actipass Co.,Ltd.
- Address:366 Gwirae-ri,Sin-ri ,Jeongnam-myeon ,Hwaseong-si
- Sungchang International Inc.
- Address:Ba-4324,Gurobon-dong ,Guro-gu
- Sun Kwang Electronic Co.
- Address:Rm3,Nonhyeon-dong ,Namdong-gu