Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8660452 | Power supply system and image forming apparatus | Seiji Saito, Tomoo Akizuki, Keisuke Ishizumi, Jun Matsumoto | 2014-02-25 |
| 8639154 | Image forming apparatus having a charge member with a foamed layer | Keisuke Ishizumi, Seiji Saito, Tomoo Akizuki | 2014-01-28 |