Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4904842 | Blowhole.multidot.pit preventing agent and arc-welding method using the same | Koichi Yasuda, Shosaburo Nakano, Noboru Nishiyama, Katsuaki Nakatsuji, Tadao Komatsu +1 more | 1990-02-27 |