Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5122486 | Method of producing silicon-nitride-based sintered body | Katsuhisa Yabuta, Masakazu Watanabe | 1992-06-16 |
| 4878812 | Turbine rotor | Katsuhisa Yabuta, Yoshinori Hattori | 1989-11-07 |