Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11180950 | Electrochromic device, optical filter, lens unit, imaging apparatus, window member, and driving method | Wataru Kubo, Kenji Yamada | 2021-11-23 |
| 11104844 | Organic compound, electrochromic device, optical filter, image pickup apparatus, window, and electrochromic mirror | Kenji Yamada | 2021-08-31 |
| 10907091 | Organic compound and electrochromic element | Kenji Yamada | 2021-02-02 |