Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6447790 | Oily material composition | Hiroji Ishii, Masako Koyama, Tomomichi Ichikawa | 2002-09-10 |
| 6387359 | Nonionic surfactant | Hiroji Ishii, Masako Koyama, Tomomichi Ichikawa | 2002-05-14 |