Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D916958 | Image drum cartridge | Masashi Fujii, Junichi Ushikubo, Shun Hatanaka | 2021-04-20 |
| D910742 | Image drum cartridge | Masashi Fujii, Junichi Ushikubo, Shun Hatanaka | 2021-02-16 |
| D910743 | Image drum cartridge | Masashi Fujii, Junichi Ushikubo, Shun Hatanaka | 2021-02-16 |