Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4986972 | Method for making silicon nitride powder | Toshitsuga Ishii, Isao Imai, Akira Sano | 1991-01-22 |
| 4985224 | Process for making silicon nitride whisker | Isao Imai, Toshitsugu Ishii | 1991-01-15 |
| 4975260 | Process for preparing metal nitride powder | Isao Imai, Toshitsugu Ishii, Toshiyuki Hirao | 1990-12-04 |