Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4904842 | Blowhole.multidot.pit preventing agent and arc-welding method using the same | Koichi Yasuda, Noboru Nishiyama, Takaro Matsumoto, Katsuaki Nakatsuji, Tadao Komatsu +1 more | 1990-02-27 |
| 4309587 | Horizontal electro-slag welding process for surfacing | Toshiharu Hiro, Noboru Nishiyama, Kazuo Agusa, Masaaki Kosho | 1982-01-05 |