Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5512722 | Key switch | Fumio Watanabe, Haruo Yoshida, Osam Kamishima, Yosuke Sakai | 1996-04-30 |
| 5448026 | Double-axis key switch | Fumio Watanabe, Haruo Yoshida, Yosuke Sakai | 1995-09-05 |
| 5430267 | Keyboard switch | Fumio Watanabe, Haruo Yoshida, Yosuke Sakai | 1995-07-04 |
| D302149 | Push button switch | — | 1989-07-11 |