Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11150574 | Image forming apparatus | Tamotsu Shimizu, Kazunori Tanaka, Shiro Kaneko | 2021-10-19 |
| 11143980 | Image forming apparatus | Tamotsu Shimizu, Kazunori Tanaka, Kenichi Tamaki | 2021-10-12 |
| 11079697 | Image forming apparatus capable of prompting for replacement of at least one of a charging roller and a cleaning blade | Tamotsu Shimizu, Kazunori Tanaka, Hiroka Itani | 2021-08-03 |