Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885398 | Process for producing hexafluoroacetone or its hydrate | Takehiro Sonoi, Toshimasa Sagawa, Okimasa Yamada | 1989-12-05 |
| D301436 | Automobile | Yoshio Ui, Yukio Kurosu | 1989-06-06 |
| 4833212 | Fluorine-containing elastomer composition | Okimasa Yamada, Takehiro Sonoi, Toshimasa Sagawa | 1989-05-23 |