Sang-Yoon Sung

Cornerstone Networks CO., LTD. engages in the manufacture and supply of information technology (IT) based didactic equipment and advanced training kits. It operates through following business divisions: Electronic Educational Equipment, Electronic Measuring Instrument, Power Supply, and Other, Its products include test and measurements, power supply, intelligent robot and educational trainer such as hydraulics pneumatics, simulation software, electricity/electronics/embedded, IT/communication, new and renewable energy. The company was founded on April 21, 1986 and is headquartered in Seongnam-si, South Korea.

G-SMATT GLOBAL Co., Ltd. engages in the manufacture and sale of light emitting diode (LED) transparent lighting glass and image sensors. It operates through Image Sensor and Smart Glass business divisions. The Image Sensor business division provides wafer, packages, and development services. The Smart Glass business division engages in the sales, rent, service, royalty, and contents of LED transparent lighting glass. The company was founded on May 26, 2000 and is headquartered in Seoul, South Korea.