Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842840 | Method for production of oxidation-resistant sialon and silicon carbide materials | Nobuyuki Azuma, Kazuo Nakamura, Minoru Maeda | 1989-06-27 |
| 4801405 | Composition for imparting fire-retardant properties to polyester fibers | Takeo Tanaka | 1989-01-31 |