Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885398 | Process for producing hexafluoroacetone or its hydrate | Toshimasa Sagawa, Okimasa Yamada, Tetsuya Mizuno | 1989-12-05 |
| 4833212 | Fluorine-containing elastomer composition | Okimasa Yamada, Tetsuya Mizuno, Toshimasa Sagawa | 1989-05-23 |