Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4956540 | Arc spot welding apparatus | Mitsuo Kohno, Masao Sakai, Toshihiko Okada, Hiroyuki Morimoto | 1990-09-11 |
| 4916283 | Water cooling plasma arc working apparatus | Kikuo Terayama, Toshihiko Okada, Masanobu Uchida, Hirokazu Kubo | 1990-04-10 |
| 4409465 | Pulse arc welding method and device in which pulse current and background current have a constant current characteristic | Hideyuki Yamamoto, Waichi Nishikawa | 1983-10-11 |