Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7042740 | Soft-switching half-bridge inverter power supply system | Keiki Morimoto, Toshimitsu Doi, Kazuhiro Tanaka, Haruhiko Manabe | 2006-05-09 |
| 5220151 | Power source apparatus for an alternating-current arc welding capable of supplying an alternating-current welding current having any waveform | Kikuo Terayama, Narumi Fukumoto, Hiroyuki Ishii | 1993-06-15 |
| 5200887 | Power supply unit for arc processing | Narumi Fukumoto, Yoshihiro Fukuju, Masahi Horii, Kikuo Terayama | 1993-04-06 |