Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5650022 | Method of nitriding steel | Akio Hashigami, Takashi MURAOKA | 1997-07-22 |
| 5593510 | Method of carburizing austenitic metal | Masaaki Tahara, Haruo Senbokuya, Tadashi Hayashida | 1997-01-14 |