Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10976683 | Electrophotographic member, electrophotographic process cartridge, and electrophotographic image forming apparatus | Kazutoshi Ishida, Minoru Nakamura, Ryo Sugiyama, Toru Ishii, Kenta Matsunaga | 2021-04-13 |
| 10935903 | Developing roller, process cartridge and image forming apparatus | Ryo Sugiyama, Kazutoshi Ishida | 2021-03-02 |