Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5373207 | Brushless vibrator motor for a wireless silent alerting device | Tadao Yamaguchi | 1994-12-13 |
| 5341057 | Vibrator motor for a wireless silent alerting device | Tadao Yamaguchi, Koichi Nakajima | 1994-08-23 |