Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5671470 | Color image forming device which changes developing bias when switching between developer units | Hiroshi Takashima, Tomoji Ishikawa, Kazuyuki Sugihara, Shinji Kato, Katsuhiro Kosuge | 1997-09-23 |