Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5104757 | Electrophotographic photosensitive member having an improved intermediate layer | Takashi Koyama, Yuichi Hashimoto | 1992-04-14 |
| 5079117 | Electrophotographic photosensitive member with electrical conductor containing polyether-polyurethane layer | Takashi Koyama, Yuichi Hashimoto, Noriko Hirayama, Kiyoshi Sakai, Teigo Sakakibara +2 more | 1992-01-07 |
| 5071723 | Electrophotographic photosensitive member with grafted polyamide interlayer | Takashi Koyama, Yuichi Hashimoto | 1991-12-10 |
| 4975352 | Electrophotographic photosensitive member and a method of preparing it | Takashi Koyama | 1990-12-04 |
| 4908288 | Electrophotographic photosensitive member | — | 1990-03-13 |
| 4895782 | Process for preparing dispersion liquid containing organic, photoconductive azo pigment and process for preparing electrophotographic, photosensitive member | Takashi Koyama, Hajime Miyazaki | 1990-01-23 |
| 4632892 | Photosensitive member with resin having low oligomer content in charge transport layer | Yuichi Yashiki, Masaaki Hiro | 1986-12-30 |