Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11862415 | Keyswitch device and keyboard | Hiromi Ohtsuka, Takuya Saitou, Momosuke Nakahara | 2024-01-02 |
| 10763054 | Keyswitch device and keyboard | Hiromi Ohtsuka, Takuya Saitou, Momosuke Nakahara | 2020-09-01 |
| 10446343 | Key switch and keyboard | Momosuke Nakahara | 2019-10-15 |
| 10134541 | Keyboard | — | 2018-11-20 |
| 9318282 | Keyboard | Takashi Nakajima, Hiromi Ohtsuka, Fujio Seki | 2016-04-19 |