Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873073 | Method for production of bismuth (III) oxide | Haruo Matsui, Kiyotaka Kato | 1989-10-10 |
| 4857155 | Process of separation of hafnium from zirconium by molten salt electrolysis | Tomoo Kirihara, Yoshinobu Seki, Yutaka Honda | 1989-08-15 |