Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853204 | Method for production of oxidation-resistant silicon nitride material | Minoru Maeda, Kazuo Nakamura | 1989-08-01 |
| 4842840 | Method for production of oxidation-resistant sialon and silicon carbide materials | Kazuo Nakamura, Minoru Maeda, Mamoru Yamada | 1989-06-27 |