Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12405550 | Developing device, process cartridge, and electrophotographic image forming apparatus | Takashi Koyanagi, Takuho Sato | 2025-09-02 |
| 11256191 | Developer carrying member, process cartridge, and electrophotographic image forming apparatus | Kazuhito Wakabayashi, Atsushi Noguchi | 2022-02-22 |
| 10459356 | Charging member, process cartridge and electrophotographic image forming apparatus | Noriyuki Doi | 2019-10-29 |
| 10365576 | Charging member, method for producing charging member, process cartridge and electrophotographic image forming apparatus | Noriyuki Doi, Yusuke Yagisawa | 2019-07-30 |
| 10078286 | Charging member, process cartridge and electrophotographic apparatus | Hiroshi Mayuzumi, Masataka Kodama, Noriyuki Doi, Kenichi Yamauchi, Noriko Suzumura +1 more | 2018-09-18 |
| 10036971 | Charging member, process cartridge, and electrophotographic image forming apparatus | Noriyuki Doi, Noriko Suzumura, Hiroshi Mayuzumi, Masataka Kodama, Kenichi Yamauchi +1 more | 2018-07-31 |
| 9989879 | Charging member, process cartridge and electrophotographic image forming apparatus | Noriyuki Doi, Masataka Kodama | 2018-06-05 |
| 9921513 | Charging member, process cartridge, and electrophotographic apparatus | Hiroki Masu, Noriyuki Doi | 2018-03-20 |
| 9885971 | Charging member, process cartridge, and electrophotographic image forming apparatus | Noriyuki Doi, Masataka Kodama | 2018-02-06 |