Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5648504 | Process for producing tetrafluorophthalic anhydride | Koji Sugimoto, Seisaku Kumai | 1997-07-15 |
| 5648568 | Method for producing a hydrofluorocarbon | Kazuya Oharu, Seisaku Kumai | 1997-07-15 |
| 5618986 | Method for producing a hydrofluorocarbon | Kazuya Oharu, Seisaku Kumai | 1997-04-08 |