Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880796 | Antimicrobial preparation | Yoshiko Okuzawa, Keiji Fujioka, Shigeji Sato, Reimei Ishikawa | 1989-11-14 |
| 4855134 | Sustained-release preparation | Keiji Fujioka, Shigeji Sato | 1989-08-08 |