Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5263517 | Toner pack for use with the developing device and method of filling up toner from the toner pack to the developing device | Takashi Ishikawa, Shinji Tsuji | 1993-11-23 |
| 5051778 | Electrophotographic copying machine which integrates components having substantially equal service lives into respective detachable units formed of a developing unit, a photoreceptor unit and a toner cartridge unit | Hisao Watanabe | 1991-09-24 |