Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10832226 | System and service determination method | Tatsuhiko Nakajima, Hiroshi Nishida | 2020-11-10 |
| 7865090 | Maintenance management system and image forming apparatus | — | 2011-01-04 |
| 5198861 | Image density control method for an image forming apparatus for reducing background contamination of a photoconductive drum | Shin Hasegawa, Hajime Oyama, Masao Moriya | 1993-03-30 |
| 5182600 | Toner end detecting method for an electrophotographic copier | Shin Hasegawa, Hajime Oyama, Masao Moriya | 1993-01-26 |
| 5127005 | Fault diagnosis expert system | Toshihiko Oda | 1992-06-30 |
| 4965637 | Control device for an image forming apparatus | Koichi Asakura, Yutaka Hasegawa, Toshiro Bando | 1990-10-23 |
| 4959687 | Bias power source controller for an image forming apparatus | Hitoshi Hoshi, Tsunehide Takahashi, Koichi Asakura | 1990-09-25 |
| 4952976 | Copier with a toner supply device | Hitoshi Hoshi | 1990-08-28 |
| 4916491 | Control device for a copier | — | 1990-04-10 |
| 4719491 | Copier | Hiroshi Yasuda | 1988-01-12 |