Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5589517 | Modified ion exchange resins and use thereof | Takahiro Sugawara, Michi Watanabe, Naoko Sumitani, Toshitaka Suzuki | 1996-12-31 |
| 5344969 | Process for purification of naphthalenedicarboxylic acid | Hiroshi Iwane, Takahiro Sugawara | 1994-09-06 |