Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6989510 | Non-copper-plated solid wire for carbon dioxide gas shielded arc welding | Yukio Yamaoka, Yong Chul Kim | 2006-01-24 |
| 6906286 | Solid wire for arc welding | Yamaoka Yukio | 2005-06-14 |