Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6498231 | Vinylpyrrolidone polymer and its stabilization and preservation processes | Daijo Tomihisa, Toshiaki Kuriyama, Tomiyasu Ueta, Akio Naka, Hideyuki Nishibayashi | 2002-12-24 |
| 6346600 | Vinylpyrrolidone polymer and its stabilization and preservation processes | Daijo Tomihisa, Toshiaki Kuriyama, Tomiyasu Ueta, Akio Naka, Hideyuki Nishibayashi | 2002-02-12 |