Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8029955 | Electrophotographic photoreceptor and image forming method | Eiichi Sakai, Kimiyuki Itou, Akihiko Itami, Takeo Oshiba | 2011-10-04 |
| 7531282 | Organic photoreceptor, image forming apparatus, image forming method and process cartridge | Shigeaki Tokutake | 2009-05-12 |
| 7466326 | Image forming method and image forming apparatus | Shigeaki Tokutake, Masao Asano, Hiroshi Yamazaki | 2008-12-16 |
| 5134050 | Photoreceptor comprising the combined use of a quinone and azo compound as charge generating materials | Yoshiaki Takei | 1992-07-28 |