Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6597344 | Key switch disposed on keyboard input device and method of producing the same | Tsuyoshi Narusawa | 2003-07-22 |
| 6483050 | Key switch with easily attachable key top | Tsuyoshi Narusawa | 2002-11-19 |
| 6312176 | Keyboard apparatus | Shouji Suganami, Seiichi Suga, Tsuyoshi Narusawa, Teruyasu Fukuyama | 2001-11-06 |
| D386488 | Data entry keyboard | Hideki Ito, Yoshirou Koutaka, Takahiro Murakami, Katsuyuki Katayama, Hiromi Chiba | 1997-11-18 |
| 5066842 | Key top | Kazuyoshi Yamagata, Kyoichi Kaneko | 1991-11-19 |