Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D423899 | Inner socket | Shozo Matsumura, Daijiro Yano, Koichi Nakayama | 2000-05-02 |
| D419845 | Inner socket | Shozo Matsumura, Daijiro Yano, Koichi Nakayama | 2000-02-01 |
| 5582079 | Bolt tightening device | Shozo Matsumura | 1996-12-10 |
| 5490439 | Nut tightening device | Shozo Matsumura | 1996-02-13 |
| 5161437 | Device for tightening up nut on bolt | Shozo Matsumura | 1992-11-10 |
| 4977799 | Clamping tool for stud bolt | Morimasa Taniguchi | 1990-12-18 |