Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689771 | Color image forming apparatus having bias controller for cleaning transfer roller | Kazuhiko Sato | 1997-11-18 |
| 5633703 | Image forming apparatus having transfer roller and separation brush | Kazuhiko Sato | 1997-05-27 |