Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5678136 | Image forming apparatus with charging member supplied with first and second DC voltages of opposite polarities | Osamu Watanabe, Nobuyuki Kume, Hiroshi Matsumoto | 1997-10-14 |