Arc welding technology using soft switching of partial resonance September 22, 2000 (Pat No. 0275667)
PULSE MAG ARC welding method Jointly registered with KERI on January 6, 2004 (Pat No. 10-0415462)
control method and mechanism for inverter welder KITECH registration and exclusive right as of April 16, 2003 (Pat No. 10-0382125-0000)
Pulse arc welding method application made jointly with KERI, Application No.: 10-0051738 (patent pending)