Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6169868 | Electrophotographic apparatus | Koji Yamazaki, Yuji Nakayama, Hironori Ohwaki | 2001-01-02 |
| 6122467 | Image forming apparatus using an amorphous silicon photosensitive member having a thin cylinder | Toshiyuki Ehara, Yuji Nakayama, Hironori Owaki | 2000-09-19 |
| 6108502 | Photosensitive member to be used for image-forming apparatus and image-forming apparatus comprising such photosensitive member as well as image forming process | Takaaki Kaya, Tetsuya Karaki | 2000-08-22 |
| 5983043 | Potential measuring apparatus and potential measuring method | Hironori Ohwaki, Koji Yamazaki, Toshiyuki Ehara, Takaaki Kaya, Tetsuya Karaki | 1999-11-09 |
| 5797072 | Apparatus and method for contact charging an amorphous silicon photoconductor via a mulipolar magnetic body having a magnetic brush layer | Toshiyuki Ehara | 1998-08-18 |
| 5732313 | Charge apparatus and image forming apparatus | Toshiyuki Ehara, Tetsuya Karaki | 1998-03-24 |
| 5561021 | Electrophotographic photosensitive member having a metal oxide material layer with an improved water repellency formed on the surface of a light receiving layer | Koji Yamazaki, Shigenori Ueda, Toshiyuki Ehara, Hiroaki Niino | 1996-10-01 |
| 5480750 | Electrophotographic process and electrophotographic apparatus | Koji Yamazaki, Shigenori Ueda, Toshiyuki Ehara, Hiroaki Niino | 1996-01-02 |