Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10073406 | Damper device and image forming apparatus | Tadahisa Sugiyama | 2018-09-11 |
| 10025259 | Image forming apparatus having a damper unit which regulates movement of a door unit | Tadahisa Sugiyama | 2018-07-17 |