Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888312 | Zirconyl phosphate sintered bodies and production thereof | Keiichiro Watanabe | 1989-12-19 |
| 4883781 | Heat resisting low expansion zirconyl phosphate-zircon composite | Keiichiro Watanabe | 1989-11-28 |