Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6664901 | Keyboard input device | Naoki Yamada | 2003-12-16 |
| 6284988 | Keyboard apparatus the operation side of which can be illuminated | Kazutoshi Watanabe, Kazuhiro Yokoyama, Katsuyuki Suzuki | 2001-09-04 |
| 5973282 | Sheet-shaped switch | Ryuichi Hagiya, Naoki Yamada | 1999-10-26 |
| 5892191 | Sheet-like switch with nonoverlapping conductive patterns | Ryuichi Hagiya, Naoki Yamada | 1999-04-06 |