- Sunny Electronics Corp
- Crystal Oscillator,TCXO,VCXO,VCTCXO,SMD,TCXO & VCTCXO,Crystal Unit SMD,Crystal Oscillator,VCXO.
- Address:Mokhang-Dong 457
- Dong Jin Electronics Co., Ltd.
- Oscillator Series,Crystal Unit,Tuning Fork,Crystal Unit,VCXO Series.
- Address:C-3501, Dongil Techno Town, 889-1, Gwanyang 2-dong ,Dongan-gu, Anyang-si
- Microquartz Electronics
- Oscillator,Crystal Unit,VCTCXO,TCXO,VCXO.
- Address:28-702, Songpa-2Dong, Songpa-Gu, Seoul, Korea
- Tech-On Co.,Ltd
- Real Time Clock Modules,Crystal Filter (MCF),Crystal Oscillators,Crystal Unit.
- Address:1599-2,Seocho-dong ,Seocho-gu
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