Issued Patents 2020
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10847232 | Semiconductor memory device | Kei Shiraishi, Masaru Koyanagi, Mikihiko Ito, Yumi Takada, Satoshi Inoue +4 more | 2020-11-24 |
| 10784866 | Semiconductor device | Masaru Koyanagi, Yutaka Takayama | 2020-09-22 |
| 10679710 | Semiconductor device | Masaru Koyanagi, Mikihiko Ito, Kei Shiraishi, Fumiya Watanabe | 2020-06-09 |
| 10530350 | Correction circuit | Masaru Koyanagi | 2020-01-07 |