Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4671930 | High hardness and high toughness nitriding powder metallurgical high-speed steel | Nobuyasu Kawai, Minoru Hirano, Hirofumi Fujimoto | 1987-06-09 |
| 4599109 | High hardness and high toughness nitriding powder metallurgical high-speed steel | Nobuyasu Kawai, Minoru Hirano, Hiromune Manto, Hirofumi Fujimoto | 1986-07-08 |