1994

Established Samdo Telecom
Participated in the development and installation
    of wireless transmission PCM terminal device

1995

Participated in CDMA development
Development of airplane obstruction lighting and automatic flasher

1998

Changed company name to Samdo Electronics

2003

Developed HH-SSLP and arc welder
Developed 800HZ commercial driver for the first time in Korea

2007

Developed PV inverter controller in

2010

Established SD Electric Co., Ltd.
Development of semi-permanent power generation system for disabled people

2017

Expansion of new plant
Changed company name to Samdo Electric Energy Co., Ltd.