- National Instruments
- Address:169,Samseong-dong ,Gangnam-gu
- Technology Korea Corporation
- Address:# 403, 709-7, Jakjeon-Dong, Gyeyang-Ku,
- Deakwang Measuring Instrument
- Address:Rm-401, Kolon Digital Tower Villant-II, Guro3-Dong, Guro-Gu, Seoul, Korea
- Metex Co.
- Address:1005-3,Doksan-dong ,Geumcheon-gu
- S.I.E Co.,Ltd.
- Address:48-1,Pyeongnae-dong ,Namyangju-si
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