Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5278613 | Image forming apparatus with transfer medium and electrometer positioned opposite the transfer region | Yasunori Kawaishi, Makoto Ohsaki | 1994-01-11 |
| 5270783 | Image forming equipment having improved toner sensing | Kouji Hayashi, Noboru Sawayama, Takeyoshi Sekine, Takayuki Maruta, Norimitu Kikuchi +5 more | 1993-12-14 |
| 5258248 | Image density control method for an image forming apparatus | Masaki Tokuhashi, Moriyuki Koike, Wataru Yasuda, Kouji Ishigaki, Chikara Imai | 1993-11-02 |
| 5227842 | Electrophotographic image forming apparatus which controls developer bias based on image irregularity | Kouji Hayashi, Norimitsu Kikuchi, Takeyoshi Sekine, Noboru Sawayama, Takayuki Maruta +4 more | 1993-07-13 |
| 5107302 | Image density control device for an image forming apparatus | — | 1992-04-21 |
| 4875079 | Toner density control for multicolor electrophotographic copier | Noboru Sawayama, Hideo Yoo | 1989-10-17 |
| 4837597 | Method and apparatus applicable to multicolor developing device for detecting image density | — | 1989-06-06 |
| 4678318 | Image forming apparatus | — | 1987-07-07 |