Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820668 | Process for preparing powdered ceramic raw materials of complex oxide | Shinsei Okabe, Shozo Kojima, Yasunobu Yoneda | 1989-04-11 |
| 4820669 | Process for preparing powdered ceramic raw materials of complex oxide | Shinsei Okabe, Shozo Kojima, Yasunobu Yoneda | 1989-04-11 |