Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871512 | Alloys for exhaust valve | Yoshiaki Takagi, Susumu Isobe | 1989-10-03 |
| 4650645 | Heat-resisting steels | Tetsuo Kato, Susumu Isobe | 1987-03-17 |
| 4631169 | Alloys for exhaust valves | Susumu Isobe, Yoshiaki Takagi, Norikatsu Sato | 1986-12-23 |