Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5142330 | Development unit having a toner layer thickness regulation member | Yasuo Hirano | 1992-08-25 |
| 5099285 | Development roller with surface layer of fluorosilicon polymer | Yasuo Hirano | 1992-03-24 |