Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5645741 | ARC processing apparatus comprising driving means for controlling output transistor so that output voltage becomes predetermined no-load voltage | Ichiro Umezawa, Satoru Yamaguchi, Hitosige Nakamura | 1997-07-08 |
| 5220151 | Power source apparatus for an alternating-current arc welding capable of supplying an alternating-current welding current having any waveform | Hirokazu Ioroi, Narumi Fukumoto, Hiroyuki Ishii | 1993-06-15 |
| 5200887 | Power supply unit for arc processing | Hirokazu Ioroi, Narumi Fukumoto, Yoshihiro Fukuju, Masahi Horii | 1993-04-06 |
| 4916283 | Water cooling plasma arc working apparatus | Moritoshi Nagasaka, Toshihiko Okada, Masanobu Uchida, Hirokazu Kubo | 1990-04-10 |