Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5774169 | Image forming apparatus | Akihito Ikegawa, Isao Doi, Masashi Yamamoto, Seishi Ojima | 1998-06-30 |
| 5652649 | Charging device and image forming apparatus | Akihito Ikegawa, Isao Doi | 1997-07-29 |
| 5631729 | Image forming apparatus | — | 1997-05-20 |
| 5606400 | Image forming apparatus with a member for shaving the surface of a photosensitive member | Akihito Ikegawa | 1997-02-25 |
| 5557375 | Contact type charging device and image forming apparatus having the same | Akihito Ikegawa, Isao Doi, Masashi Yamamoto | 1996-09-17 |
| 5504561 | Contact charger and image forming apparatus provided with same | Akihito Ikegawa, Masaki Asano, Masashi Yamamoto | 1996-04-02 |
| 5402213 | Charging device for charging outer surface of photosensitive member including charging member formed by a layer comprising a copolymer of an olefin-type vinyl monomer and a fluorine-contained monomer | Akihito Ikegawa, Masaki Asano, Masashi Yamamoto | 1995-03-28 |
| 5376995 | Contact charger having a curved surface | Masashi Yamamoto, Masaki Asano, Akihito Ikegawa | 1994-12-27 |