Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11305367 | Non-consumable electrode arc-welding method | Masatoshi Ooie, Toshiyuki Tanaka, Ichiro Umezawa | 2022-04-19 |
| 7235760 | AC pulse arc welding method | Hongjun Tong | 2007-06-26 |