Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6977518 | Electrical leak detecting apparatus | Hirotada Higashihama, Hisashi Usui, Toshiaki Saito, Yoji Minami | 2005-12-20 |
| 5154242 | Power tools with multi-stage tightening torque control | Shinichi Okamoto | 1992-10-13 |