Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7477857 | Developing unit, image forming device, and developing bias control method | — | 2009-01-13 |
| 7274885 | Image forming device having replaceable drum unit and developing unit | — | 2007-09-25 |
| 6639617 | Image forming apparatus having a control unit that controls exposure energy and related image forming method | — | 2003-10-28 |
| 5903798 | Image recording apparatus having means for applying an optimum voltage to a transfer roller | Takahiro Sasai | 1999-05-11 |