DEC 1996

Attained UL certification

MAR 1996

Attained New Technology (NT)
certificate

DEC 1995

Registered thermostat utility model patent (No. 093119) through KIPO

JAN 1992

Registered “RAINBOW” trademark (No. 40-0231879) through KIPO

NOV 1988

Relocated Head Office Building (Songnae-dong, Bucheon, KOREA)

FEB 1986

Registered design of boiler thermostat (No. 60655) through KIPO

FEB 1985

Developed Pressure Switch

FEB 1983

Began development and mass production of thermostats
Established RAINBOW ELECTRONICS (Shindorim-dong, Seoul, KOREA)