Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7234574 | Damping coefficient switching-type hydraulic damper | Yoshinori Matsunaga | 2007-06-26 |
| 7143875 | Attenuation coefficient switching type hydraulic damper | Yoshinori Matsunaga | 2006-12-05 |
| 6608558 | Damper device for building, and monitor and control system for damper device | Shii Sen, Yuji Kotake, Toshikazu Yamada | 2003-08-19 |
| 5979126 | Seismic response control method for structure | Naoki Niwa | 1999-11-09 |