Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6812420 | Key switch operating mechanism assembly for electronic portable device | Mitsumasa Kako | 2004-11-02 |
| 6812421 | Key switch device, keyboard with the key switch device, and electronic device with the keyboard | Hirofumi Sato | 2004-11-02 |
| 6753793 | Key switch device, keyboard and electronic apparatus with key switch | Mitsumasa Kako | 2004-06-22 |