Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11189441 | Key switch device | Kazuhira Izawa, Mamiko Naka, Hiroaki Fujino | 2021-11-30 |
| 11004628 | Key switch device | Kazuhira Izawa, Mamiko Naka, Shigenobu Kishi | 2021-05-11 |
| 10915181 | Push button switch with operation unit latched to base | Kazuhira Izawa, Hiroaki Fujino, Mamiko Naka | 2021-02-09 |