Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7700674 | Vinylpyrrolidone-based polymer composition | Keiichi Fujise, Akio Naka, Daijyo Tomihisa | 2010-04-20 |
| 6486281 | Process for preparing high-purity vinylpyrrolidone polymer | Akira Kitada, Keiichi Fujise | 2002-11-26 |
| 6465592 | Process for preparing vinylpyrrolidone polymer | Akira Kitada, Keiichi Fujise | 2002-10-15 |