Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7525056 | Key switch structure | Toshimi Chiba, Shigeru Yamada | 2009-04-28 |
| 6541724 | Key switch | Yuichiro Nozawa | 2003-04-01 |
| 5914468 | Keyboard unit and key switch | Takashi Nishimura, Toshimi Chiba, Sadao Tachibana, Yuichiro Nozawa | 1999-06-22 |