Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9555770 | Steering lock device | Takashi Yoshizawa, Yoshio Watanuki | 2017-01-31 |
| 8469412 | Door handle device | Kenji Mizushima, Mitsuo NISHIZUKA | 2013-06-25 |
| 6604392 | Cylinder lock device | Takashi Yoshizawa | 2003-08-12 |