Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8741525 | Resin coated carrier, two-component developer, developing device and image forming apparatus | Osamu Wada, Takanori Kamoto, Tadashi Iwamatsu, Nobuyuki Yoshioka, Hiroyuki Hirakawa +3 more | 2014-06-03 |
| 8401430 | Electron emitting element for accelerating and emitting electrons, and use of electron emitting element | Tadashi Iwamatsu, Toshihiro Tamura, Hiroyuki Hirakawa, Yoshio Ichii | 2013-03-19 |
| 7970318 | Charging device and image forming device using same | Tadashi Iwamatsu | 2011-06-28 |